Patents by Inventor Alexandra Boltasseva

Alexandra Boltasseva 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).

  • Publication number: 20210325577
    Abstract: A plasmonic system is disclosed. The system includes at least one polarizer that is configured to provide at least one linearly polarized broadband light beam, an anisotropic plasmonic metasurface (APM) assembly having a plurality of nanoantennae each having a predetermined orientation with respect to a global axis representing encoded digital data, the APM assembly configured to receive the at least one linearly polarized broadband light beam and by applying localized surface plasmon resonance reflect light with selectable wavelengths associated with the predetermined orientations of the nanoantennae, and at least one analyzer that is configured to receive the reflected light with selectable wavelength, wherein the relative angles between each of the at least one analyzers and each of the at least one polarizers are selectable with respect to the global axis, thereby allowing decoding of the digital data.
    Type: Application
    Filed: April 7, 2021
    Publication date: October 21, 2021
    Applicant: Purdue Research Foundation
    Inventors: Alexander V. Kildishev, Di Wang, Zhaxylyk A. Kudyshev, Maowen Song, Alexandra Boltasseva, Vladimir M. Shalaev
  • Publication number: 20210302623
    Abstract: An optical sensor system, comprising refractory plasmonic elements that can withstand temperatures exceeding 2500° C. in chemically aggressive and harsh environments that impose stress, strain and vibrations. A plasmonic metamaterial or metasurface, engineered to have a specific spectral and angular response, exhibits optical reflection characteristics that are altered by varying physical environmental conditions including but not limited to temperature, surface chemistry or elastic stress, strain and other types of mechanical load. The metamaterial or metasurface comprises a set of ultra-thin structured layers with a total thickness of less than tens of microns that can be deployed onto surfaces of devices operating in harsh environmental conditions. The top interface of the metamaterial or metasurface is illuminated with a light source, either through free space or via an optical fiber, and the reflected signal is detected employing remote detectors.
    Type: Application
    Filed: March 31, 2020
    Publication date: September 30, 2021
    Applicant: Purdue Research Foundation
    Inventors: Urcan Guler, Alexander V. Kildishev, Krishnakali Chaudhury, Shaimaa Azzam, Esteban E. Marinero-Caceres, Harsha Reddy, Alexandra Boltasseva, Vladimir M. Shalaev
  • Patent number: 11119042
    Abstract: A system of writing to and reading from a magnetic nanostructure is disclosed which includes an opto-magnetic write arrangement including a polarizer configured to receive incident light and provide a circularly or linearly polarized light, wherein light polarization is controlled by the polarizer and its orientation with respect to polarization of the incident light, a nanomagnetic structure configured to receive the polarized light including a substrate, and a nanomagnetic stack including a nanomagnet, and a capping layer, wherein the nanomagnetic stack is configured to receive the polarized light and thereby switch orientation of a magnetic moment associated with the magnetic nanostructure whereby the magnetic moment direction specifies a bit value held in the magnetic structure, and a magnetic read arrangement, configured to receive and interpret an optical signal from the magnetic nanostructure indicating the magnetic moment orientation from the nanomagnetic stack.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: September 14, 2021
    Assignee: Purdue Research Foundation
    Inventors: Aveek Dutta, Vladimir M. Shalaev, Alexandra Boltasseva, Esteban E. Marinero-Caceres
  • Patent number: 10876946
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: December 29, 2020
    Assignee: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20200371026
    Abstract: A system of writing to and reading from a magnetic nanostructure is disclosed which includes an opto-magnetic write arrangement including a polarizer configured to receive incident light and provide a circularly or linearly polarized light, wherein light polarization is controlled by the polarizer and its orientation with respect to polarization of the incident light, a nanomagnetic structure configured to receive the polarized light including a substrate, and a nanomagnetic stack including a nanomagnet, and a capping layer, wherein the nanomagnetic stack is configured to receive the polarized light and thereby switch orientation of a magnetic moment associated with the magnetic nanostructure whereby the magnetic moment direction specifies a bit value held in the magnetic structure, and a magnetic read arrangement, configured to receive and interpret an optical signal from the magnetic nanostructure indicating the magnetic moment orientation from the nanomagnetic stack.
    Type: Application
    Filed: August 11, 2020
    Publication date: November 26, 2020
    Applicant: Purdue Research Foundation
    Inventors: Aveek Dutta, Vladimir M. Shalaev, Alexandra Boltasseva, Esteban E. Marinero-Caceres
  • Publication number: 20200347508
    Abstract: Titanium nitride (TiN) nanofurnaces are fabricated in a method that involves anodization of a titanium (Ti) foil to form TiO2 nanocavities. After anodization, the TiO2 nanocavities are converted to TiN at 600° C. under ammonia flow. The resulting structure is an array of refractory (high-temperature stable) subwavelength TiN cylindrical cavities that operate as plasmonic nanofurnaces capable of reaching temperatures above 600° C. under moderate concentrated solar irradiation. The nanofurnaces show near-unity solar absorption in the visible and near infrared spectral ranges and a maximum thermoplasmonic solar-to-heat conversion efficiency of 68 percent.
    Type: Application
    Filed: May 3, 2020
    Publication date: November 5, 2020
    Inventors: Vladimir M. Shalaev, Zhaxylyk Kudyshev, Alexandra Boltasseva, Alberto Naldoni, Alexander Kildishev, Luca Mascaretti, Stephán Kment, Radek Zboril, Jeong Eun Yoo, Patrik Schmuki
  • Publication number: 20200285043
    Abstract: An optical device, wherein the optical device includes a dielectric layer over a mirror layer. The optical device further includes a plurality of plasmonic nanoparticles over the dielectric layer. Additionally, the optical device includes a protective layer over the plurality of plasmonic nanoparticles.
    Type: Application
    Filed: February 19, 2020
    Publication date: September 10, 2020
    Applicant: Purdue Research Foundation
    Inventors: Piotr Nyga, Alexander V. Kildishev, Sarah Nahar Chowdhury, Alexandra Boltasseva, Zhaxylyk Kudyshev, Vladimir M. Shalaev
  • Patent number: 10754295
    Abstract: A device for producing a subwavelength hologram. The device comprises a metasurface layer attached to a substrate. The metasurface layer includes an array of plasmonic antennas that simultaneously encode both wavelength and phase information of light directed through the array to produce a hologram. The wavelength is determined by the size of the antennas, and the phase is determined by the orientation of the antennas.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: August 25, 2020
    Assignee: Purdue Research Foundation
    Inventors: Amr Shaltout, Sajid Choudhury, Alexander V. Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev
  • Patent number: 10739261
    Abstract: A magneto-plasmonic nanostructure is disclosed. The structure includes a substrate, and a magneto-plasmonic stack, comprising a nano-sized plasmonic resonator, a nanomagnet, and a capping layer, wherein the nano-sized plasmonic resonator is configured to receive circularly polarized light at an intensity to thereby increase normal component of plasmon-generated opto-magnetic field, HOM,z, at least at the interface of one of i) the nano-sized plasmonic resonator and the nanomagnet, or ii) the nanomagnet and the capping layer, whereby the HOM,z direction is perpendicular to the rotational direction of the circularly polarized light and the nanomagnets in the magneto-plasmonic stack switches its magnetic moment in response to a change of the HOM,z direction in response to a change of the rotational direction of the circularly polarized light.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: August 11, 2020
    Assignee: Purdue Research Foundation
    Inventors: Aveek Dutta, Vladimir M. Shalaev, Alexandra Boltasseva, Esteban E. Marinero-Caceres
  • Patent number: 10670772
    Abstract: An optical sensor system, comprising refractory plasmonic elements that can withstand temperatures exceeding 2500° C. in chemically aggressive and harsh environments that impose stress, strain and vibrations. A plasmonic metamaterial or metasurface, engineered to have a specific spectral and angular response, exhibits optical reflection characteristics that are altered by varying physical environmental conditions including but not limited to temperature, surface chemistry or elastic stress, strain and other types of mechanical load. The metamaterial or metasurface comprises a set of ultra-thin structured layers with a total thickness of less than tens of microns that can be deployed onto surfaces of devices operating in harsh environmental conditions. The top interface of the metamaterial or metasurface is illuminated with a light source, either through free space or via an optical fiber, and the reflected signal is detected employing remote detectors.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: June 2, 2020
    Assignee: Purdue Research Foundation
    Inventors: Urcan Guler, Alexander V. Kildishev, Krishnakali Chaudhury, Shaimaa Azzam, Esteban E. Marinero-Caceres, Harsha Reddy, Alexandra Boltasseva, Vladimir M Shalaev
  • Publication number: 20200141852
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Application
    Filed: December 17, 2019
    Publication date: May 7, 2020
    Applicant: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20200054752
    Abstract: Disclosed herein are nanoparticle-based plasmonic solutions to therapeutic applications employing titanium nitride (TiN) and other non-stoichiometric compounds as the plasmonic material. Current solutions are suboptimal because they require complex shapes, large particle sizes, and a narrow range of sizes, in order to achieve plasmonic resonances in the biological window. The nanoparticles discloses herein provide plasmonic resonances occurring in the biological window even with small sizes, simple shapes, and better size dispersion restrictions. Local heating efficiencies of such nanoparticles outperform currently used Au and transition metal nanoparticles. The use of smaller particles with simpler shapes and better heating efficiencies allows better diffusion properties into tumor regions, larger penetration depth of light into the biological tissue, and the ability to use excitation light of less power.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 20, 2020
    Applicant: Purdue Research Foundation
    Inventors: Urcan Guler, Alexander Kildishev, Gururaj Naik, Alexandra Boltasseva, Vladimir M. Shalaev
  • Patent number: 10508981
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: December 17, 2019
    Assignee: Purdue Research Foundation
    Inventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20190353830
    Abstract: A plasmonic system is disclosed. The system includes at least one polarizer that is configured to provide at least one linearly polarized broadband light beam, an anisotropic plasmonic metasurface (APM) assembly having a plurality of nanoantennae each having a predetermined orientation with respect to a global axis representing encoded digital data, the APM assembly configured to receive the at least one linearly polarized broadband light beam and by applying localized surface plasmon resonance reflect light with selectable wavelengths associated with the predetermined orientations of the nano antennae, and at least one analyzer that is configured to receive the reflected light with selectable wavelength, wherein the relative angles between each of the at least one analyzers and each of the at least one polarizers are selectable with respect to the global axis, thereby allowing decoding of the digital data.
    Type: Application
    Filed: May 13, 2019
    Publication date: November 21, 2019
    Applicant: Purdue Research Foundation
    Inventors: Alexander V. Kildishev, Di Wang, Zhaxylyk A. Kudyshev, Maowen Song, Alexandra Boltasseva, Vladimir M. Shalaev
  • Publication number: 20190331598
    Abstract: A magneto-plasmonic nanostructure is disclosed. The structure includes a substrate, and a magneto-plasmonic stack, comprising a nano-sized plasmonic resonator, a nanomagnet, and a capping layer, wherein the nano-sized plasmonic resonator is configured to receive circularly polarized light at an intensity to thereby increase normal component of plasmon-generated opto-magnetic field, HOM,z, at least at the interface of one of i) the nano-sized plasmonic resonator and the nanomagnet, or ii) the nanomagnet and the capping layer, whereby the HOM,z direction is perpendicular to the rotational direction of the circularly polarized light and the nanomagnets in the magneto-plasmonic stack switches its magnetic moment in response to a change of the HOM,z direction in response to a change of the rotational direction of the circularly polarized light.
    Type: Application
    Filed: April 30, 2019
    Publication date: October 31, 2019
    Applicant: Purdue Research Foundation
    Inventors: Aveek Dutta, Vladimir M. Shalaev, Alexandra Boltasseva, Esteban E. Marinero-Caceres
  • Patent number: 10436780
    Abstract: A particle sensing system which includes a plurality of micro-lenses which focus light from an unfocused or loosely focused light source onto a corresponding plurality of focus regions on a surface containing plasmonic structures. The absorption of light by the plasmonic structures in the focus regions results in heat dissipation in the plasmonic structures and consequently increases surface temperature in the focus regions. When an electrical field is applied to a sample fluid in contact with the surface, multiple electrothermal flows are induced in the fluid which rapidly transport suspended particles to the focus regions on the surface. The particles can then be captured and/or sensed.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: October 8, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Justus C. Ndukaife, Alexander V. Kildishev, Agbai (George) A. Nnanna, Alexandra Boltasseva, Vladimir M. Shalaev, Steven Truitt Wereley
  • Publication number: 20190154558
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Application
    Filed: January 15, 2019
    Publication date: May 23, 2019
    Applicant: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Patent number: 10180383
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 15, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20180329115
    Abstract: An optical sensor system, comprising refractory plasmonic elements that can withstand temperatures exceeding 2500° C. in chemically aggressive and harsh environments that impose stress, strain and vibrations. A plasmonic metamaterial or metasurface, engineered to have a specific spectral and angular response, exhibits optical reflection characteristics that are altered by varying physical environmental conditions including but not limited to temperature, surface chemistry or elastic stress, strain and other types of mechanical load. The metamaterial or metasurface comprises a set of ultra-thin structured layers with a total thickness of less than tens of microns that can be deployed onto surfaces of devices operating in harsh environmental conditions. The top interface of the metamaterial or metasurface is illuminated with a light source, either through free space or via an optical fiber, and the reflected signal is detected employing remote detectors.
    Type: Application
    Filed: May 14, 2018
    Publication date: November 15, 2018
    Applicant: Purdue Research Foundation
    Inventors: Alexander V. Kildishev, Urcan Guler, Krishnakali Chaudhury, Shaimaa Azzam, Esteban E. Marinero-Caceres, Harsha Reddy, Alexandra Boltasseva, Vladimir M Shalaev
  • Publication number: 20180246467
    Abstract: A device for producing a subwavelength hologram. The device comprises a metasurface layer attached to a substrate. The metasurface layer includes an array of plasmonic antennas that simultaneously encode both wavelength and phase information of light directed through the array to produce a hologram. The wavelength is determined by the size of the antennas, and the phase is determined by the orientation of the antennas.
    Type: Application
    Filed: April 19, 2018
    Publication date: August 30, 2018
    Inventors: Amr Shaltout, Sajid Choudhury, Alexander V. Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev