Patents by Inventor John D. Joannopoulos
John D. Joannopoulos 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).
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Patent number: 11685271Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: GrantFiled: August 31, 2021Date of Patent: June 27, 2023Assignee: Massachusetts Institute of TechnologyInventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: 11685270Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.Type: GrantFiled: September 1, 2020Date of Patent: June 27, 2023Assignee: MITInventors: Aristeidis Karalis, Andre B. Kurs, Robert Moffatt, John D. Joannopoulos, Peter H. Fisher, Marin Soljacic
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Publication number: 20220123594Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: ApplicationFiled: August 31, 2021Publication date: April 21, 2022Inventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: 11005413Abstract: A near-field ThermoPhotoVoltaic system comprises a hot emitter and a cold absorbing PhotoVoltaic cell separated by a small gap. The emitter emits hot photons and includes a polaritonic material that supports a surface-polaritonic mode. The PhotoVoltaic cell has a metallic back electrode and includes a semiconductor that absorbs the photons and supports guided photonic modes. The surface-polaritonic mode and the first guided photonic mode resonantly couple at a frequency slightly above the semiconductor bandgap. The system material and geometrical parameters are such that the surface-polaritonic mode and the first guided photonic mode are approximately impedance-matched, so that power is transmitted at frequencies just above the semiconductor bandgap, even for relatively large gap widths, while the power transmitted at other frequencies is relatively small, leading to high system efficiency.Type: GrantFiled: January 8, 2018Date of Patent: May 11, 2021Assignee: Massachusetts Institute of TechnologyInventors: Aristeidis Karalis, John D. Joannopoulos
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Publication number: 20210078418Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.Type: ApplicationFiled: September 1, 2020Publication date: March 18, 2021Inventors: Aristeidis Karalis, Andre B. Kurs, Robert Moffatt, John D. Joannopoulos, Peter H. Fisher, Marin Soljacic
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Publication number: 20200343771Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: ApplicationFiled: April 17, 2020Publication date: October 29, 2020Inventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: 10666091Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: GrantFiled: November 8, 2018Date of Patent: May 26, 2020Assignee: Massachusetts Institute of TechnologyInventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: 10505334Abstract: An apparatus for generating Smith-Purcell radiation having at least one spectral component at a wavelength ? includes a periodic structure including a dielectric material and an electron source, in electromagnetic communication with the periodic structure, to emit an electron beam propagating within about 5? from a surface of the periodic structure to induce emission of the Smith-Purcell radiation. The electron beam has an electron energy tunable between about 0.5 keV and about 40 keV so as to change a wavelength of the Smith-Purcell radiation.Type: GrantFiled: April 3, 2018Date of Patent: December 10, 2019Assignee: Massachusetts Institute of TechnologyInventors: Yi Yang, Aviram Massuda, Charles Roques-Carmes, Nicholas H. Rivera, Tena Dubcek, John D. Joannopoulos, Karl Kimon Berggren, Ido E. Kaminer, Marin Soljacic, Yujia Yang, Steven E. Kooi, Phillip Donald Keathley
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Patent number: 10406723Abstract: A fiber is provided that has been thermally drawn from a fiber preform, having a longitudinal-axis length and including at least one core that has a longitudinal core axis parallel to the longitudinal axis and internally disposed to at least one outer fiber cladding material layer along the fiber length. The fiber is fed through a localized heating site having a heating site temperature, T, that is above a melting temperature of the fiber core, with a feed speed, ?f, that melts a portion of the fiber core at the heating site, causing molten droplets to pinch off of fiber core material, one droplet at a time, with a time period of molten droplet formation set by the fiber feed speed, ?f. The fiber is fed through the localized heating site to move the molten droplets out of the heating site and solidify the molten droplets into solid in-fiber particles.Type: GrantFiled: March 13, 2014Date of Patent: September 10, 2019Assignees: University of Central Florida Research Foundation, Massachusetts Institute of TechnologyInventors: Yoel Fink, Ayman F. Abouraddy, Benjamin Jean-Baptiste Grena, Alexander Gumennik, John D. Joannopoulos, Guillaume R. Lestoquoy, Lei Wei
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Patent number: 10324237Abstract: A transparent display includes nanoparticles having wavelength-selective scattering (e.g., resonant scattering) to preferentially scatter light at one or more discrete wavelengths so as to create images. The nanoparticles transmit light at other wavelengths to maintain a high transparency of the display. The nanoparticles are disposed in proximity to a thin film, which can enhance the scattering the process by reflecting light back to the nanoparticles for re-scattering or increasing the quality factor of the resonant scattering.Type: GrantFiled: March 31, 2017Date of Patent: June 18, 2019Assignee: Massachusetts Institute of TechnologyInventors: Marin Soljacic, Bo Zhen, Emma Anquillare, Yi Yang, Chia Wei Hsu, John D. Joannopoulos
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Publication number: 20190173318Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: ApplicationFiled: November 8, 2018Publication date: June 6, 2019Inventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Publication number: 20190123586Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.Type: ApplicationFiled: September 21, 2018Publication date: April 25, 2019Inventors: Aristeidis Karalis, Andre B. Kurs, Robert Moffatt, John D. Joannopoulos, Peter H. Fisher, Marin Soljacic
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Patent number: 10141790Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: GrantFiled: October 25, 2017Date of Patent: November 27, 2018Assignee: Massachusetts Institute of TechnologyInventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: 10112321Abstract: Herein is provided a fiber that includes a cladding material disposed along a longitudinal-axis fiber length and a plurality of discrete and disconnected high-stress domains that are disposed as a sequence along a longitudinal line parallel to the longitudinal fiber axis in at least a portion of the fiber length. Each high stress domain has an internal pressure of at least 0.1 GPa and comprises a material that is interior to and different than the fiber cladding material.Type: GrantFiled: March 13, 2014Date of Patent: October 30, 2018Assignee: Massachusetts Institute of TechnologyInventors: Alexander Gumennik, Yoel Fink, Benjamin Jean-Baptiste Grena, John D. Joannopoulos
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Patent number: 10097044Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.Type: GrantFiled: June 20, 2016Date of Patent: October 9, 2018Assignee: Massachusetts Institute of TechnologyInventors: Aristeidis Karalis, Andre B. Kurs, Robert Moffatt, John D. Joannopoulos, Peter H. Fisher, Marin Soljacic
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Publication number: 20180287329Abstract: An apparatus for generating Smith-Purcell radiation having at least one spectral component at a wavelength A includes a periodic structure including a dielectric material and an electron source, in electromagnetic communication with the periodic structure, to emit an electron beam propagating within about 5? from a surface of the periodic structure to induce emission of the Smith-Purcell radiation. The electron beam has an electron energy tunable between about 0.5 keV and about 40 keV so as to change a wavelength of the Smith-Purcell radiation.Type: ApplicationFiled: April 3, 2018Publication date: October 4, 2018Inventors: Yi YANG, Aviram MASSUDA, Charles ROQUES-CARMES, Nicholas H. RIVERA, Tena DUBCEK, John D. JOANNOPOULOS, Karl Kimon BERGGREN, Ido E. KAMINER, Marin SOLJACIC, Yujia YANG, Steven E. KOOI, Phillip Donald Keathley
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Patent number: 10073191Abstract: A filter to transmit incident radiation at a predetermined incidence angle includes a plurality of photonic crystal structures disposed substantially along a surface normal direction of the filter. The photonic crystal structure includes a multilayer cell that comprises a first layer having a first dielectric permittivity, and a second layer having a second dielectric permittivity different from the first dielectric permittivity. The first layer and the second layer define a Brewster angle substantially equal to the predetermined incidence angle based on the first dielectric permittivity and the second permittivity. Each photonic crystal structure in the plurality of photonic crystal structures defines a respective bandgap, and the respective bandgaps of the plurality of photonic crystal structures, taken together, cover a continuous spectral region of about 50 nm to about 100 mm.Type: GrantFiled: February 24, 2015Date of Patent: September 11, 2018Assignee: Massachusetts Institute of TechnologyInventors: Yichen Shen, Dexin Ye, Ivan Celanovic, Steven G. Johnson, John D. Joannopoulos, Marin Soljacic
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Publication number: 20180159460Abstract: An apparatus for generating electricity via thermophotovoltaic (TPV) energy conversion includes a metallic combustor to convert fuel into heat. The apparatus also includes a metallic photonic crystal to emit electromagnetic radiation within a predetermined wavelength band in response to receiving the heat from the combustor. A brazing layer is disposed between the combustor and the photonic crystal to couple the combustor with the photonic crystal. The apparatus also includes a photovoltaic cell, in electromagnetic communication with the photonic crystal, to convert the electromagnetic radiation emitted by the photonic crystal into electricity.Type: ApplicationFiled: December 6, 2017Publication date: June 7, 2018Inventors: Walker Chan, Ivan Celanovic, John D. Joannopoulos, Marin Soljacic, Veronika Stelmakh
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Publication number: 20180138751Abstract: Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.Type: ApplicationFiled: October 25, 2017Publication date: May 17, 2018Inventors: John D. Joannopoulos, Aristeidis Karalis, Marin Soljacic
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Patent number: RE47157Abstract: The present invention provides systems, articles, and methods for discriminating electromagnetic radiation based upon the angle of incidence of the electromagnetic radiation. In some cases, the materials and systems described herein can be capable of inhibiting reflection of electromagnetic radiation (e.g., the materials and systems can be capable of transmitting and/or absorbing electromagnetic radiation) within a given range of angles of incidence at a first incident surface, while substantially reflecting electromagnetic radiation outside the range of angles of incidence at a second incident surface (which can be the same as or different from the first incident surface). A photonic material comprising a plurality of periodically occurring separate domains can be used, in some cases, to selectively transmit and/or selectively absorb one portion of incoming electromagnetic radiation while reflecting another portion of incoming electromagnetic radiation, based upon the angle of incidence.Type: GrantFiled: June 12, 2017Date of Patent: December 11, 2018Assignee: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Peter Bermel, Ivan Celanovic, Marin Soljacic, Adrian Y. X. Yeng, Michael Ghebrebrhan, John D. Joannopoulos