Light Responsive Structure Patents (Class 257/21)
  • Patent number: 10824048
    Abstract: A electronic method, includes receiving, by a graphene structure, a microwave signal. The microwave signal has a driving voltage level. The electronic method includes generating, by the graphene structure, optical photons based on the microvolts. The electronic method includes outputting, by the graphene structure, the optical photons.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: November 3, 2020
    Assignee: Abu Dhabi University
    Inventors: Montasir Yousof Abdallah Qasymeh, Hichem El Euch
  • Patent number: 10777696
    Abstract: A ternary superlattice structure includes a substrate and periodic layer structure on the substrate and having alternating infrared absorbing semiconductor materials having a first layer of InAs[1-x]Sb[x] ternary alloy material, and a second layer of In[1-y]Z[y]As ternary alloy material, wherein Z is Ga or Al, wherein x is in a range of greater than zero and less than one, wherein y is in a range of greater than zero and less than one, and wherein a thickness of each of the first and second layers are substantially similar and configured to absorb light in a predetermined spectral band and prevent trapping of carriers in any particular layer. In examples, y is in a range from about 0.05 to about 0.35, and x is in a range of about 0.2 to about 0.8.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: September 15, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Gamini Ariyawansa, Charles J. Reyner, John E. Scheihing, Joshua M. Duran
  • Patent number: 10677649
    Abstract: The present invention relates to an optoelectronic apparatus comprising: —an optoelectronic device comprising: —a transport structure (T) comprising a 2-dimensional layer; —a photosensitizing structure (P) configured and arranged to absorb incident light and induce changes in the electrical conductivity of the transport structure (T); and —drain (D) and source (S) electrodes electrically connected to respective separate locations of the transport structure (T); —noise suppression means comprising a modulation unit including: —a control unit to generate and apply on the drain (D) or source (S) electrodes a voltage oscillating signal having a component with a frequency of ?m/2?; and —a signal extraction unit to extract a required electric signal, from an output signal, with no components below ?m/2?. The present invention also concerns to a method for suppressing noise for an optoelectronic apparatus according to the invention, and to the use of the apparatus as a light detector or as an image sensor.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: June 9, 2020
    Assignees: FUNDACIÓ INSTITUT DE CIÈNCIES FOTÒNIQUES, INSTITUCIÓ CATALANA DE RECERCA I ESTUDIS AVANÇATS
    Inventors: Frank Koppens, Stijn Goossens, Gerasimos Konstantatos
  • Patent number: 10665632
    Abstract: The invention relates to a method for manufacturing a photodetector able to operate for the photodetection of infrared electromagnetic waves, comprising a stack of thin layers placed on top of one another. The method includes obtaining a first assembly (E1) of stacked layers, forming a detection assembly, comprising a first substrate layer, a photoabsorbent layer, a barrier layer and at least one contact layer, and a second assembly (E2) of stacked layers forming a reading circuit, comprising at least one second substrate layer and a multiplexing layer. The first and second assemblies are glued between the contact layer of the first assembly and the multiplexing layer of the second assembly. Etching through the second assembly makes it possible to obtain a plurality of interconnect vias, then p or n doping of zones of the first contact layer of the first assembly through the interconnect vias.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 26, 2020
    Assignees: THALES, COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
    Inventors: Jean-Luc Reverchon, Axel Evirgen, Florian Le Goff
  • Patent number: 10600927
    Abstract: An infrared detecting semiconductor device comprises: an optical absorbing layer of type-II disposed between first conductivity-type and second conductivity-type semiconductor layers; and an optical filtering film of n-type InGaAs having an n-type dopant concentration larger than 8×1017 cm?3. The optical filtering film includes first to third semiconductor regions, which are sequentially arranged in a direction of a first axis on the optical filtering film. The first semiconductor region has an n-type dopant concentration of 2.0×1019 cm?3 or more. The third semiconductor region has a n-type concentration of 3.0×1018 cm?3 or less. The second semiconductor region has an n-type dopant profile monotonically changing from a first dopant concentration at a boundary between the first and second semiconductor regions to a second dopant concentration at a boundary between the second and third semiconductor regions. The first dopant concentration is greater than the second dopant concentration.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: March 24, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Sundararajan Balasekaran, Hiroshi Inada
  • Patent number: 10580821
    Abstract: This light-receiving element includes a plurality of photoelectric conversion layers, each of which includes a compound semiconductor, and absorbs a wavelength in an infrared region to generate an electric charge, and an insulating film that is provided to surround each of the plurality of photoelectric conversion layers.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: March 3, 2020
    Assignee: SONY CORPORATION
    Inventor: Shinichi Yoshida
  • Patent number: 10481433
    Abstract: An optical/RF apparatus comprising a liquid crystal (LC) layer placed above or below a plasmon layer (e.g., a periodic array of graphene ribbons) to enable the tuning of the surface plasmons by varying the voltage applied to the LC to realize thereby devices such as tunable mid-IR, far-IR or THz modulators and filters.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: November 19, 2019
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Victor Yu Reshetnyak, Dean R. Evans
  • Patent number: 10468540
    Abstract: An AlSb lattice matched barrier infrared detector architecture with the AlSb binary barrier layer enables implementation of strain layer superlattice absorbers with higher absorption coefficients for improved quantum efficiency, presents a simplified structure for epitaxial growth, and enables the utilization of bulk InAs0.815Sb0.185 absorber material with a 5.0 ?m cutoff for both single and dual color devices. Such an infrared detector is formed by growing the detector material; bottom contact, 1st absorber layer, AlSb barrier, optional graded layer, 2nd absorber layer, top contact, on top of an AlSb lattice matched buffer layer. Epitaxial growth on the AlSb lattice enables the deposition of unstrained bulk InAs0.815Sb0.185 with a 5.0 ?m cutoff, as well as InAs/InAs(x)Sb(1-x) superlattice absorbers with a continuously tunable cutoff from mid-wavelength to long-wavelength infrared.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: November 5, 2019
    Assignee: UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE ARMY
    Inventors: Neil F. Baril, Sumith V. Bandara
  • Patent number: 10466571
    Abstract: Methods, systems, and devices are disclosed for implementing electro-optical modulators in which a resonating cavity structure is coupled to a transmission waveguide. In one example, the resonating structure includes a ring resonator whose coupling strength is controlled via an electrical control signal. The ring resonator is made of a capacitor comprising monolayer graphene sheets separated by a thick layer of dielectric material.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 5, 2019
    Assignee: Cornell University
    Inventors: Christopher Phare, Michal Lipson
  • Patent number: 10466613
    Abstract: A light-emitting device includes multiple transfer elements, multiple setting elements, multiple light-emitting elements, and a controller. The transfer elements sequentially enter an on state. The setting elements are connected to the transfer elements. In response to the transfer elements entering the on state, the setting elements are allowed to enter an on state. Each of the light-emitting elements is connected to a corresponding one of the setting elements. In response to each of the setting elements entering the on state, the corresponding one of the light-emitting elements enters an on state to emit light or increase a light emission intensity thereof. The light-emitting elements are maintained in the on state in parallel. The controller controls the setting elements to enter the on state in accordance with a received illumination control signal, and controls an illumination period of the light-emitting elements.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: November 5, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takashi Kondo, Seiji Ono, Chikaho Ikeda
  • Patent number: 10462323
    Abstract: A laser printing system includes a laser configured to produce a beam of light modulated according to image data input to the laser printing system, a photoreceptor drum including a photoconductive layer disposed along an outer peripheral surface of the photoreceptor drum, and a non-mechanical beam steerer configured for receiving the modulated light beam from the laser and steering the light beam in a scanning motion back and forth across the photoconductive layer of the photoreceptor drum. The laser printing system also includes a printer controller configured to structure the image data input to the laser printing system, and control an amount of electrical current flowing through portions of the non-mechanical beam steerer to change an effective index of refraction of the non-mechanical beam steerer and steer the modulated light beam in the scanning motion.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 29, 2019
    Assignee: CAPITAL ONE SERVICES, LLC
    Inventor: David Wurmfeld
  • Patent number: 10453995
    Abstract: The present disclosure provides a light-emitting device and manufacturing method thereof. The light-emitting device comprising: a light-emitting stack; and a semiconductor layer having a first surface connecting to the light-emitting stack, a second surface opposite to the first surface, and a void; wherein the void comprises a bottom part near the first surface and an opening on the second surface, and a dimension of the bottom part is larger than the dimension of the opening.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 22, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Wen-Luh Liao, Chih-Chiang Lu, Shih-Chang Lee, Hung-Ta Cheng, Hsin-Chan Chung, Yi-Chieh Lin
  • Patent number: 10439093
    Abstract: A photovoltaic photodetector includes a substrate, a graphene layer, and a dielectric layer positioned between the substrate and the graphene layer. One or more first antenna electrodes includes a first metal in direct contact with the graphene layer. One or more second antenna electrodes includes a second metal in direct contact with the graphene layer. The first and second metals have different work functions. A drain electrode is electrically coupled to the one or more first antenna electrodes, and a source electrode is electrically coupled to the one or more second antenna electrodes. The photovoltaic photodetector can be configured to be operable over a wavelength region of 2 ?m to 24 ?m and has a response time of 10 ns or less.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: October 8, 2019
    Assignee: Arizon Board of Regents on behalf of Arizona State University
    Inventor: Yu Yao
  • Patent number: 10401543
    Abstract: A type-II hybrid absorber photodetector (PD) is provided with ultrafast speed and high-power performance at terahertz (THz) regime. Through narrowed bandgap and enhanced absorption process at a type-II interface between absorption layers of gallium arsenic antimonide (GaAs0.5Sb0.5) and indium gallium arsenide (In0.53Ga0.47As), the incorporation of the type-II P+-GaAs0.5Sb0.5/i-In0.53Ga0.47As hybrid absorber in an indium phosphide (InP) UTC-PD obtains improvement in responsivity. Current blocking effect is minimized owing to the high-excess energy of photo-generated electrons injected from the GaAs0.5Sb0.5 layer to an InP-based collector layer. The flip-chip bonding packaged device shows a moderate responsivity along with a record wide optical-to-electrical bandwidth at 0.33 THz, among all the reported for long-wavelength ultrafast PDs. A saturation current exceeding 13 mA and a continuous-wave output power of ?3 decibel-milliwatts are demonstrated at an operating frequency of 0.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: September 3, 2019
    Assignee: National Central University
    Inventor: Jin-Wei Shi
  • Patent number: 10353280
    Abstract: A light converter (200) comprises: a solid-state light conversion material (201) that generates emission light from excitation light incident on its surface; a filler layer (230, 240) on the surface of the solid-state light conversion material (201); and an optical coating (220, 250) on the filler layer. The optical coating (220, 250) may be a thin film, such as an anti-reflective coating (220) and/or a high-reflective coating (250). A metallic coating (260) may additionally be provided. The light converter (200) may be used for an optical device, such as a phosphor wheel or automotive headlight.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: July 16, 2019
    Assignee: MATERION CORPORATION
    Inventors: Yuyong Huang, Simon Cao
  • Patent number: 10312399
    Abstract: A photodiode having a reduced dark current includes a semiconductor layer, a first contact part, a second contact part, and an active region. The first contact part disposed in a first region of the semiconductor layer includes an interlayer and at least one metal layer. The second contact part disposed in a second region of the semiconductor layer includes at least one metal layer. The active region is disposed between the first contact part and the second contact part. The first contact part and the second contact part are arranged asymmetrical to each other.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: June 4, 2019
    Assignees: SK HYNIX INC., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Hyun-Yong Yu, Hwan-Jun Zang
  • Patent number: 10260946
    Abstract: Optical computing devices may include capacitance-based nanomaterial detectors. For example, an optical computing device may include a light source that emits electromagnetic radiation into an optical train extending from the light source to a capacitance-based nanomaterial detector; a material positioned in the optical train to optically interact with the electromagnetic radiation and produce optically interacted light; and the capacitance-based nanomaterial detector comprising one or more nano-sized materials configured to have a resonantly-tuned absorption spectrum and being configured to receive the optically interacted light, apply a vector related to the characteristic of interest to the optically interacted light using the resonantly-tuned absorption spectrum, and generate an output signal indicative of the characteristic of interest.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: April 16, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James M. Price, Aditya B. Nayak, David L. Perkins, Michael T. Pelletier
  • Patent number: 10254478
    Abstract: In one aspect, a composition of matter is disclosed, which comprises a photonic crystal comprising a plurality of 2D or 3D periodically repeating structures, where the structures are configured and arranged relative to one another such that the photonic crystal exhibits a Dirac cone at the center of the Brillouin zone of its reciprocal lattice, e.g., at one frequency in the optical regime. In some embodiments, the structures are formed of a dielectric material.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: April 9, 2019
    Assignee: President And Fellows Of Harvard College
    Inventors: Eric Mazur, Yang Li, Orad Reshef, Marko Loncar, Shota Kita, Philip Alejandro Munoz, Daryl Vulis
  • Patent number: 10243314
    Abstract: A device for a gain medium for a semiconductor laser has an active region, a buffer layer, a substrate, and an etch stop between the buffer layer and the substrate. The device is bonded to a silicon platform having silicon devices, such as a waveguide and mirror. The substrate is removed, after bonding the device to the platform. The buffer layer is made of different material than the substrate to reduce undercut of the buffer layer during substrate removal compared to a buffer layer made of the same material as the substrate.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: March 26, 2019
    Assignee: Skorpios Technologies, Inc.
    Inventor: John Y. Spann
  • Patent number: 10217500
    Abstract: The present invention relates to an inductive spin-orbit torque device and the method for fabricating the same. The method comprises steps of depositing a two-dimensional thin film using chemical vapor deposition (CVD) and sputtering a ferromagnetic material on the thin film. The crystal structure of the two-dimensional thin film includes at least one lattice plane arranged asymmetrically. The thickness of the two-dimensional thin film includes at least one unit-cell layer. The sum of the at least one unit-cell layer is an odd number. By using the vertical magnetic torque generated by the two-dimensional thin film and the miniaturization in thickness, the device size and the fabrication costs may be reduced.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: February 26, 2019
    Assignee: National Applied Research Laboratories
    Inventors: Yann-Wen Lan, Qiming Shao, Guoqiang Yu, Kang-Lung Wang, Wen-Kuan Yeh
  • Patent number: 10197903
    Abstract: Embodiments of the disclosure provide a projection display apparatus comprising: a light source for emitting a light beam; a first light path configured to project the light beam emitted from the light source to a first display position; a second light path configured to project the light beam emitted from the light source to a second display position; a light patch switching device configured to switch the light beam emitted from the light source between the first light path and the second light path; and a light modulation device through which both the first light path and the second light path pass, wherein the light modulation device is configured to modulate the light beam passing therethrough to generate a display image.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: February 5, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Zhongxiao Li
  • Patent number: 10170660
    Abstract: A photovoltaic device includes a digital alloy buffer layer including a plurality of alternating layers of semiconductor material. An absorption layer epitaxially is grown on the digital alloy buffer layer, an intrinsic layer is formed on the absorption layer and a doped layer is formed on the intrinsic layer. A conductive contact is formed on the doped layer.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventors: Karthik Balakrishnan, Stephen W. Bedell, Pouya Hashemi, Bahman Hekmatshoartabari, Alexander Reznicek
  • Patent number: 10115837
    Abstract: Integrated circuits and methods of producing the same are provided. In an exemplary embodiment, an integrated circuit includes a substrate with a handle layer, a buried insulator layer overlying the handle layer, and an active layer overlying the buried insulator layer. The handle layer and the active layer include monocrystalline silicon. A transistor overlies the buried insulator layer, and a solar cell is within the handle layer such that the buried insulator layer is between the solar cell and the transistor. The solar cell includes a solar cell outer layer in electrical communication with a solar cell outer layer contact, and a solar cell inner layer in electrical communication with a solar cell inner layer contact. The solar cell inner and outer layers are monocrystalline silicon.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 30, 2018
    Assignee: Globalfoundries Singapore Pte. Ltd.
    Inventors: Bin Liu, Eng Huat Toh
  • Patent number: 10090292
    Abstract: A radial nanowire Esaki diode device includes a semiconductor core of a first conductivity type and a semiconductor shell of a second conductivity type different from the first conductivity type. The device may be a TFET or a solar cell.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: October 2, 2018
    Assignee: QUNANO AB
    Inventors: Lars-Erik Wernersson, Erik Lind, Jonas Ohlsson, Lars Samuelson, Mikeal Bjork, Claes Thelander, Anil Dey
  • Patent number: 10079473
    Abstract: A light-emitting component includes laser elements and a setting unit. Each laser element is set to be in an on state with a logical value “m (m represents an integer of 1 or more)”, an on state considered as having a logical value “0”, or an off state. The setting unit sets the laser element to be in a state ready to transition to an on state and sets the laser element in the state ready to transition to the on state to be in the on state considered as having a logical value “0” before a timing of setting the laser element to the on state with a logical value “m”.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: September 18, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Takashi Kondo
  • Patent number: 10067064
    Abstract: An optical fiber includes a graphene oxide and a reduced graphene oxide and a gas sensor includes the optical fiber. A method for manufacturing the optical fiber includes coating a graphene oxide layer and reducing a part of the graphene oxide layer, and a method for manufacturing the gas sensor includes coating a graphene oxide layer and reducing a part of the graphene oxide layer.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: September 4, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Hyoyoung Lee, Surajit Some
  • Patent number: 10059992
    Abstract: Under one aspect, a device is provided for use in luminescent imaging. The device can include a photonic superlattice including a first material, the first material having a first refractive index. The first material can include first and second major surfaces and first and second pluralities of features defined though at least one of the first and second major surfaces, the features of the first plurality differing in at least one characteristic from the features of the second plurality. The photonic superlattice can support propagation of a first wavelength and a second wavelength approximately at a first angle out of the photonic superlattice, the first and second wavelengths being separated from one another by a first non-propagating wavelength that does not selectively propagate at the first angle out of the photonic superlattice. The device further can include a second material having a second refractive index that is different than the first refractive index.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: August 28, 2018
    Assignee: ILLUMINA, INC.
    Inventors: Dietrich Dehlinger, Cheng Frank Zhong, Juraj Topolancik
  • Patent number: 10002896
    Abstract: Infrared radiation micro device, cover for such a device and method for its fabrication, the device comprising a substrate and a cover and an infrared radiation detecting, emitting or reflecting infrared micro unit, the infrared micro unit being arranged in a cavity defined between the substrate and the cover, the cover comprising an antireflective surface texture to enhance the transmissibility of infrared radiation, wherein a distance frame formed in an additive process on the substrate side of the cover and/or the cover side of the substrate is arranged between substrate and cover.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: June 19, 2018
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., ULIS SAS
    Inventors: Wolfgang Reinert, Jochen Quenzer, Sebastien Tinnes, Cécile Roman
  • Patent number: 9929237
    Abstract: A GNR is a ribbon-shaped graphene film which includes: five or more (for example, five, seven, or nine) six-membered rings of carbon atoms which are bonded and arranged in line in a short side direction; and a complete armchair type edge structure along a long side direction. By such a constitution, without using a transfer method, there are materialized a highly reliable graphene film which has an armchair type edge structure with a uniform width at a desired value and which enables an electric current on-off ratio of 105 or more that is practically sufficient for exhibiting a desired band gap.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 27, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Junichi Yamaguchi, Shintaro Sato, Hiroko Yamada, Kazuki Tanaka
  • Patent number: 9912408
    Abstract: Methods and systems for silicon photonics wavelength division multiplexing transceivers are disclosed and may include, in a transceiver integrated in a silicon photonics chip: generating a first modulated output optical signal at a first wavelength utilizing a first electrical signal, generating a second modulated output optical signal at a second wavelength utilizing a second electrical signal, communicating the first and second modulated output optical signals into an optical fiber coupled to the chip utilizing a multiplexing grating coupler in the chip. A received input optical signal may be split into a modulated input optical signal at the first wavelength and a modulated input optical signal at the second wavelength utilizing a demultiplexing grating coupler in the chip. The first and second modulated input optical signals may be converted to first and second electrical input signals utilizing first and second photodetectors in the chip.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: March 6, 2018
    Assignee: Luxtera, Inc.
    Inventors: Attila Mekis, Peter De Dobbelaere, Lieven Verslegers, Peng Sun, Yannick De Koninck
  • Patent number: 9887310
    Abstract: A semiconductor layered structure includes a substrate formed of a III-V compound semiconductor, a buffer layer disposed on and in contact with the substrate and formed of a III-V compound semiconductor, and a quantum well layer disposed on and in contact with the buffer layer and including a plurality of component layers formed of III-V compound semiconductors. The substrate has a diameter of 55 mm or more. At least one of the component layers is formed of a mixed crystal of three or more elements. When the compound semiconductor forming the substrate has a lattice constant d1, the compound semiconductor forming the buffer layer has a lattice constant d2, and the compound semiconductors forming the quantum well layer have an average lattice constant d3, (d2?d1)/d1 is ?3×10?3 or more and 3×10?3 or less, and (d3?d1)/d1 is ?3×10?3 or more and 3×10?3 or less.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: February 6, 2018
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Katsushi Akita, Kei Fujii, Takashi Kyono, Koji Nishizuka, Kaoru Shibata
  • Patent number: 9881965
    Abstract: A color back-side illuminated image sensor including, on the side of the thin semiconductor layer opposite to the illuminated surface, periodic thickness unevennesses forming an optic network having characteristics which make it capable of reflecting a given wavelength chosen within the range of the wavelengths of an illuminating incident beam.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: January 30, 2018
    Assignee: STMicroelectronics S.A.
    Inventor: Jérôme Vaillant
  • Patent number: 9735384
    Abstract: A composite material is described. The composite material comprises semiconductor nanocrystals, and organic molecules that passivate the surfaces of the semiconductor nanocrystals. One or more properties of the organic molecules facilitate the transfer of charge between the semiconductor nanocrystals. A semiconductor material is described that comprises p-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of electrons in the semiconductor material being greater than or equal to a mobility of holes. A semiconductor material is described that comprises n-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of holes in the semiconductor material being greater than or equal to a mobility of electrons.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: August 15, 2017
    Assignee: InVisage Technologies, Inc.
    Inventors: Edward Hartley Sargent, Ghada Koleilat, Larissa Levina
  • Patent number: 9698192
    Abstract: Embodiments described herein relate to a dual-band photodetector. The dual-band photodetector includes a barrier layer (10) disposed between two infrared absorption layers (8, 12) wherein the barrier layer (10) is lattice matched to at least one of the infrared absorption layers (8, 12). Furthermore, one infrared absorption layer includes dilute nitride to adjust the band gap to a desired cut-off wavelength while maintaining valence-band alignment with the barrier layer. Embodiments also relate to a system and processes for producing the photodetector fabricated from semiconductor materials.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: July 4, 2017
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Adam M. Crook, Matthew J. Reason, Barrett Spells
  • Patent number: 9691931
    Abstract: Optically sensitive devices include a device comprising a first contact and a second contact, each having a work function, and an optically sensitive material between the first contact and the second contact. The optically sensitive material comprises a p-type semiconductor, and the optically sensitive material has a work function. Circuitry applies a bias voltage between the first contact and the second contact. The optically sensitive material has an electron lifetime that is greater than the electron transit time from the first contact to the second contact when the bias is applied between the first contact and the second contact. The first contact provides injection of electrons and blocking the extraction of holes. The interface between the first contact and the optically sensitive material provides a surface recombination velocity less than 1 cm/s.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: June 27, 2017
    Assignee: InVisage Technologies, Inc.
    Inventors: Igor Constantin Ivanov, Edward Hartley Sargent, Hui Tian
  • Patent number: 9680040
    Abstract: A semiconductor device and the like having high quantum efficiency or high sensitivity in a near-infrared to infrared region is provided. The semiconductor device includes: a substrate; a multiple quantum well structure disposed on the substrate, and including a plurality of pairs of a layer a and a layer b; and a crystal-adjusting layer disposed between the substrate and the multiple quantum well structure. The crystal-adjusting layer includes a first adjusting layer which is made of the same material as the substrate and is in contact with the substrate, and a second adjusting layer which is made of the same material as the layer a or the layer b of the multiple quantum well structure and is in contact with the multiple quantum well structure.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: June 13, 2017
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kaoru Shibata, Katsushi Akita, Kei Fujii, Takashi Ishizuka
  • Patent number: 9660117
    Abstract: A semiconductor device has a layered structure. The semiconductor device includes a metallic layer of thickness 1-100 nm, with a thickness optimized to absorb light in a wavelength range of operation. The device further includes an adjacent semiconductor layer additionally adjacent to an ohmic electrical contact, wherein the interface between the metallic layer and the semiconductor layer is electrically rectifying and energy selective. The device further includes a reflective back surface positioned opposite to the semiconductor layer relative to incident light providing broadband reflection in the wavelength range of operation. The semiconductor layer includes a quantum well adjacent to the metallic layer, wherein the energy selectivity is provided by the quantum well allowing charge carrier tunneling from the metallic layer.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: May 23, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: James Andrew Robert Dimmock, Matthias Kauer, Nicholas J. Ekins-Daukes, Paul N. Stavrinou
  • Patent number: 9653701
    Abstract: A flexible display apparatus includes a flexible substrate, a display layer disposed on one surface of the flexible substrate and including a plurality of pixels, graphene disposed on a surface opposing the one surface of the flexible substrate, and an encapsulation layer covering the display layer.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: May 16, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Ho Choi, Hyun-Woo Joo, Myung-Soo Huh
  • Patent number: 9643841
    Abstract: An antenna system includes an elongated conductive plane and an elongated dielectric layer that is disposed on the conductive plane. An elongated graphene nanoribbon is disposed along an axis and is coupled to the dielectric layer at a graphene/dielectric interface. A feeding mechanism is coupled to the conductive plane. The feeding mechanism is configured to accept a signal that excites surface plasmon polariton waves at the graphene/dielectric interface. In a method of making a surface plasmon polariton wave antenna, an elongated conductive plane is formed. An elongated dielectric layer is applied on a surface of the conductive plane. An elongated graphene nanoribbon is applied to the dielectric layer. A signal source is coupled to the elongated conductive plane.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: May 9, 2017
    Assignee: Georgia Tech Research Corporation
    Inventors: Ian F. Akyildiz, Josep Miquel Jornet
  • Patent number: 9640680
    Abstract: An optical device includes an optically transparent and electrically conducting conductor including graphene, a network of metal nanowires, or graphene integrated with a network of metal nanowires. The optical device includes a II VI compound semiconductor, a III V compound semiconductor, or InAsSb.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: May 2, 2017
    Assignee: HRL Laboratories, LLC
    Inventors: Kyung-Ah Son, Hasan Sharifi, Jeong-Sun Moon, Wah S. Wong, Hwa Chang Seo
  • Patent number: 9635284
    Abstract: An infrared camera system is provided to detect absorption of infrared radiation in a selected spectral bandwidth. In one example, an infrared camera system includes a lens adapted to receive infrared radiation from a survey scene comprising one or more gasses. The infrared camera system also includes a focal plane array comprising a plurality of quantum well infrared photo detectors (QWIPs). The QWIPs are tuned to detect a limited spectral bandwidth of the infrared radiation corresponding to at least a portion of an infrared absorption band of the one or more gasses. The infrared camera system also includes an optical band pass filter positioned substantially between the lens and the focal plane array. The optical band pass filter is adapted to filter the infrared radiation to a wavelength range substantially corresponding to the limited spectral bandwidth of the QWIPs before the infrared radiation is received by the focal plane array.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: April 25, 2017
    Assignee: FLIR Systems, Inc.
    Inventors: Robert G. Benson, Thomas J. Scanlon, Paul A. Czerepuszko
  • Patent number: 9608167
    Abstract: A light emitting device uses an Ag wire and exhibits excellent light extraction efficiency. In the light emitting device, a pad electrode of a light emitting element and a mount electrode are connected to each other using an Ag wire. The pad electrode contains Pt in a region where the Ag wire is bonded.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: March 28, 2017
    Assignee: NICHIA CORPORATION
    Inventor: Yasuhiro Miki
  • Patent number: 9608148
    Abstract: A method for producing a semiconductor element includes a step of forming a multiple quantum well in which a GaSb layer and an InAs layer are alternately stacked on a GaSb substrate by MOVPE, wherein, in the step of forming a multiple quantum well, an InSb film is formed on at least one of a lower-surface side and an upper-surface side of the InAs layer so as to be in contact with the InAs layer.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: March 28, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Kyono, Kei Fujii, Katsushi Akita
  • Patent number: 9520510
    Abstract: A detector to detect light of a wavelength range and an incidence angle range, the detector including a substrate, a plurality of dielectric structures on the substrate, each one of the plurality of dielectric structures being to receive light through a side of the dielectric structure opposite the substrate, and a plurality of conductive structures on the substrate, consecutive conductive structures of the plurality of conductive structures having a corresponding dielectric structure of the plurality of dielectric structures therebetween, wherein the consecutive conductive structures and the corresponding dielectric structure form a cavity to induce an absorption resonance in response to receiving the light of the wavelength range.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: December 13, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jiuzhi Xue, Krishna C. Balram, David M. Hoffman
  • Patent number: 9496060
    Abstract: The invention refers to a nanodevice for generating electromagnetic radiation in the terahertz frequency range, the nanodevice comprising a substrate (3) made of a dielectric material, a first graphene layer (1) arranged on the substrate (3), having a first longitudinal end being electrically connected with a source contact (source 1) and having a second longitudinal end being connected with a drain contact (drain 1), an electrically conducting layer (2) having a periodic grating structure with grating stripes (6) extending substantially in transversal direction (y), and a dielectric layer (4) arranged between the first graphene layer (1) and the conducting layer (2).
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: November 15, 2016
    Assignee: UNIVERSITAET AUGSBURG
    Inventor: Sergey Mikhailov
  • Patent number: 9490292
    Abstract: An infrared photo-detector array and a method for manufacturing it are disclosed. The infrared photo-detector array contains a collector layer, a first absorber layer that absorbs incident light of a first wavelength band and generates first electrons and first holes, a second absorber layer that absorbs incident light of a second wavelength band and generates second electrons and second holes, and wherein the wavelengths of the incident light in the first wavelength band are shorter than the wavelengths of the incident light in the second wavelength band, and wherein the second absorber layer is laterally contiguous across at least two photo-detectors. The method disclosed teaches how to manufacture the infrared photo-detector array.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: November 8, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Rajesh D. Rajavel
  • Patent number: 9366576
    Abstract: An apparatus for detecting electromagnetic radiation within a target frequency range is provided. The apparatus includes a substrate and one or more resonator structures disposed on the substrate. The substrate can be a dielectric or semiconductor material. Each of the one or more resonator structures has at least one dimension that is less than the wavelength of target electromagnetic radiation within the target frequency range, and each of the resonator structures includes at least two conductive structures separated by a spacing. Charge carriers are induced in the substrate near the spacing when the resonator structures are exposed to the target electromagnetic radiation. A measure of the change in conductivity of the substrate due to the induced charge carriers provides an indication of the presence of the target electromagnetic radiation.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: June 14, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Harold Y. Hwang, Mengkun Liu, Richard D. Averitt, Keith A. Nelson, Aaron Sternbach, Kebin Fan
  • Patent number: 9349970
    Abstract: A photodetector includes one or more photodiodes and a signal processing circuit. Each photodiode includes a transparent first electrode, a second electrode, and a heterojunction interposed between the first electrode and the second electrode. Each heterojunction includes a quantum dot layer and a fullerene layer disposed directly on the quantum dot layer. The signal processing circuit is in signal communication each the second electrode. The photodetector may be responsive to wavelengths in the infrared, visible, and/or ultraviolet ranges. The quantum dot layer may be treated with a chemistry that increases the charge carrier mobility of the quantum dot layer.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: May 24, 2016
    Assignee: Research Triangle Institute
    Inventors: Ethan Klem, John Lewis
  • Patent number: RE47964
    Abstract: Provided is a display device. The display device includes a circuit substrate, a light source electrically connected to the circuit substrate, the light source being disposed under the circuit substrate, and a light conversion member disposed on a light emitting surface of the light source and a side of the circuit substrate, the light conversion member converting a wavelength of light emitted from the light source. Here, the light conversion member is disposed also on a side surface of the circuit substrate and converts a wavelength of light emitted from the light source. Since the light conversion member is disposed on the side surface of the circuit substrate, the light conversion member may be aligned with the light source without interfering with the circuit substrate. Thus, the display device may effectively convert the wavelength of the light emitted from the light source to realize improved brightness and color impression.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: April 28, 2020
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jung Mok Lee, Jae Hyun Jin
  • Patent number: RE48012
    Abstract: Provided is a display device. The display device includes a circuit substrate, a light source electrically connected to the circuit substrate, the light source being disposed under the circuit substrate, and a light conversion member disposed on a light emitting surface of the light source and a side of the circuit substrate, the light conversion member converting a wavelength of light emitted from the light source. Here, the light conversion member is disposed also on a side surface of the circuit substrate and converts a wavelength of light emitted from the light source. Since the light conversion member is disposed on the side surface of the circuit substrate, the light conversion member may be aligned with the light source without interfering with the circuit substrate. Thus, the display device may effectively convert the wavelength of the light emitted from the light source to realize improved brightness and color impression.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 26, 2020
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jung Mok Lee, Jae Hyun Jin