Patents by Inventor Nader Engheta

Nader Engheta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9952383
    Abstract: Graphene may support electromagnetic radiation and be able to support a variety of optical devices. In general, graphene may exhibit changeability in properties such as the conductivity and the like of graphene. Graphene may comprise carbon and be of a thickness of a single atomic layer. In another embodiment, Graphene may be thicker than a single atomic layer, but may be able to exhibit changeability in the properties noted above. Disclosed herein is the guiding and manipulating of optical signals on layers of graphene to create waveguides, ribbon waveguides, beamsplitters, lenses, attenuators, mirrors, scatterers, Fourier optics, Luneburg lenses, metamaterials and other optical devices.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: April 24, 2018
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Nader Engheta, Ashkan Vakil
  • Patent number: 9500785
    Abstract: A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 22, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania, Toyota Central Research and Development Laboratories, Inc.
    Inventors: Hideo Iizuka, Nader Engheta, Yasuhiko Takeda
  • Patent number: 9500784
    Abstract: Optical devices using double-groove diffraction gratings having periodic sets of TiO2 elements on one or more surfaces of an SiO2 substrate are disclosed. First order components of incident polarized light coupled into the substrate are reflected so as to propagate through the substrate to terminus points where they either change direction for further propagation or exit the substrate. A windshield display system using the principles of the invention is disclosed.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 22, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 9285519
    Abstract: A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: March 15, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustess of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 9008471
    Abstract: Circuits and circuit elements adapted to function at optical or infrared frequencies are made from plasmonic and/or nonplasmonic particles disposed on a substrate, where the plasmonic and nonplasmonic particles have respective dimensions substantially smaller than a wavelength of an applied optical or infrared signal. Such particles are deposited on a substrate in a variety of shapes and sizes from a variety of plasmonic and/or nonplasmonic materials so as to form resistors, capacitors, inductors and circuits made from combinations of these elements.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: April 14, 2015
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Nader Engheta, Alessandro Salandrino, Andrea Alu
  • Patent number: 8976450
    Abstract: A light switch (or valve) made up of two mutually inverted, substantially identical diffraction gratings with a liquid medium therebetween, arranged to allow the grating substrates to be shifted laterally relative to one another so as to align and mis-align the grating elements. When aligned, incident-polarized light passes through the switch and when misaligned, light does not pass through the switch but is reflected.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: March 10, 2015
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta, Hisayoshi Fujikawa
  • Publication number: 20140144506
    Abstract: A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure.
    Type: Application
    Filed: January 31, 2014
    Publication date: May 29, 2014
    Applicants: Toyota Motor Engineering and Manufacturing North America, Inc., Toyota Central Research and Development Laboratories, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta, Yasuhiko Takeda
  • Patent number: 8675279
    Abstract: A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: March 18, 2014
    Assignees: Toyota Motor Engineering and Manufacturing North America, Inc., The Trustees of the University of Pennsylvania, Toyota Central Research and Development Laboratories, Inc.
    Inventors: Hideo Iizuki, Nader Engheta, Yasuhiko Takeda
  • Publication number: 20130271838
    Abstract: Optical devices using double-groove diffraction gratings having periodic sets of TiO2 elements on one or more surfaces of an SiO2 substrate are disclosed. First order components of incident polarized light coupled into the substrate are reflected so as to propagate through the substrate to terminus points where they either change direction for further propagation or exit the substrate. A windshield display system using the principles of the invention is disclosed.
    Type: Application
    Filed: June 5, 2013
    Publication date: October 17, 2013
    Applicants: THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA, TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: HIDEO IIZUKA, NADER ENGHETA
  • Publication number: 20130163069
    Abstract: Graphene may support electromagnetic radiation and be able to support a variety of optical devices. In general, graphene may exhibit changeability in properties such as the conductivity and the like of graphene. Graphene may comprise carbon and be of a thickness of a single atomic layer. In another embodiment, Graphene may be thicker than a single atomic layer, but may be able to exhibit changeability in the properties noted above. Disclosed herein is the guiding and manipulating of optical signals on layers of graphene to create waveguides, ribbon waveguides, beamsplitters, lenses, attenuators, mirrors, scatterers, Fourier optics, Luneburg lenses, metamaterials and other optical devices.
    Type: Application
    Filed: June 8, 2011
    Publication date: June 27, 2013
    Applicant: The Trustees of The University of Pennsylvnia
    Inventors: Nader Engheta, Ashkan Vakil
  • Patent number: 8467643
    Abstract: Optical devices using double-groove diffraction gratings having periodic sets of TiO2 elements on one or more surfaces of an SiO2 substrate are disclosed. First order components of incident polarized light coupled into the substrate are reflected so as to propagate through the substrate to terminus points where they either change direction for further propagation or exit the substrate. A windshield display system using the principles of the invention is disclosed.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: June 18, 2013
    Assignees: Toyota Motor Engineering & Mfg. North America, Inc., Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 8400706
    Abstract: An acousto-optic laser beam scanner of improved scanning angle scope is provided by introducing a controllable compound acoustic waveform into a light transmissive body wherein at least binary and binary diffraction grating patterns of both positive and negative sense can be introduced into the body, the period of the waveform determining the refraction angle magnitude and the order of the pulses determining the refraction angle direction.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: March 19, 2013
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Nader Engheta, Hisayoshi Fujikawa
  • Patent number: 8396319
    Abstract: Shadow is an inseparable aspect of all natural scenes. When there are multiple light sources or multiple reflections several different shadows may overlap at the same location and create complicated patterns. Shadows are a potentially good source of information about a scene if the shadow regions can be properly identified and segmented. However, shadow region identification and segmentation is a difficult task and improperly identified shadows often interfere with machine vision tasks like object recognition and tracking. A shadow separation and contrast enhancement method based on the polarization of light is provided. Polarization information of scenes is captured by a polarization-sensitive camera and the scenes are processed to effectively separate shadows from different light sources.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: March 12, 2013
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Edward N. Pugh, Jr., Nader Engheta, Shih-Schon Lin, Konstantin Yemelyanov
  • Patent number: 8369000
    Abstract: A photonic crystal structure that is composed of a host media having periodic dielectric holes disposed in the media at a period of ah. Each dielectric hole has a radius rh. The host media has an absolute refractive index expressed as |nh| that is less than 0.2. The photonic crystal structure has at least one reflection minimization layer disposed at an air/photonic crystal interface. The reflection minimization layer has periodic dielectric holes disposed therein at a period am with each dielectric hole having a radius rm such that ah=am and rm>rn and a beam steerable device including the photonic crystal structure. The device having a scanning rate of larger than 1 KHz and a scanning angle up to ±25 degrees.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: February 5, 2013
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 8293087
    Abstract: The present invention is directed to the use of dielectrophoretic forces for the arbitrary manipulation of micrometer- and nanometer-sized particles and to devices capable of arbitrarily manipulating micrometer- and nanometer-sized particles by means of dielectrophoretic forces within a two- or three-dimensional region. The devices and methods of the invention are capable of arbitrarily controlling the velocities, locations, and forces applied to a particle, arbitrarily specifying a force or set of forces at a location in space, and determining friction and/or drag coefficients of a particle, and are thus well-suited for a range of applications including cell sorting, drug delivery, as a diagnostic tool for determining membrane stiffness, and in the heterogeneous integration of micro- and nano-components through directed assembly.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: October 23, 2012
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Nader Engheta, Brian Edwards
  • Patent number: 8284477
    Abstract: A lumped nanocircuit element design at IR and optical frequencies is provided that can effectively act as a lumped “diode” and a lumped “rectifier” for rectifying optical field displacement currents or optical electric field. The lumped nanocircuit element design can also act as a lumped second harmonic generator. The element is formed by juxtaposing an epsilon-negative nanoparticle with a nonlinear optical nanostructure.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: October 9, 2012
    Assignee: The Trustees of the University of Pennsylvania
    Inventor: Nader Engheta
  • Publication number: 20120250140
    Abstract: An acousto-optic laser beam scanner of improved scanning angle scope is provided by introducing a controllable compound acoustic waveform into a light transmissive body wherein at least binary and binary diffraction grating patterns of both positive and negative sense can be introduced into the body, the period of the waveform determining the refraction angle magnitude and the order of the pulses determining the refraction angle direction.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 4, 2012
    Applicant: Toyota Motor Engineering and Manufacturing North America, Inc.
    Inventors: Hideo IIZUKA, Nader ENGHETA, Hisayoshi FUJIKAWA
  • Patent number: 8264773
    Abstract: A grating structure for splitting light. The grating structure including alternating ridges and grooves. The ridges and grooves are configured such that the grating directs p-polarization components of incident light to the ?1st order diffraction mode and s-polarization components of incident light to the 0th order diffraction mode.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: September 11, 2012
    Assignees: Toyota Motor Engineering and Manufacturing North America, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 8254227
    Abstract: A frequency-modulated coding and data recording and storage device that uses plasmonic-dielectric nanostructures of concentric two-layer core-shell design to store data includes a flat transparent substrate having a top surface divided into cells with side dimension d on the order of tens of nanometers and a core-shell plasmonic-dielectric nanostructure disposed in each cell. Each plasmonic nanostructure of concentric core-shell has a predetermined ratio of radii and a predetermined aspect ratio such that when an infrared or visible wavelength signal is applied to each said core-shell plasmonic-dielectric nanostructure a peak scattering amplitude of the applied signal is at different plasmonic resonance frequencies for core-shell plasmonic-dielectric nanostructures with different ratio of radii and different aspect ratios.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: August 28, 2012
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Nader Engheta, Alessandro Salandrino
  • Publication number: 20120075703
    Abstract: A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest.
    Type: Application
    Filed: December 2, 2011
    Publication date: March 29, 2012
    Applicants: The Trustees of the University of Pennsylvania, Toyota Motor Engineering and Manufacturing North America, Inc.
    Inventors: Hideo IIZUKA, Nader ENGHETA