Patents by Inventor Rafif E. Hamam
Rafif E. Hamam 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: 9831682Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ?B2, and during the wireless energy transfers, adjusting at least one of the coupling rates ?1B and ?B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.Type: GrantFiled: August 13, 2014Date of Patent: November 28, 2017Assignee: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Aristeidis Karalis, John D. Joannopoulos, Marin Soljacic
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Patent number: 9057830Abstract: 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: July 19, 2011Date of Patent: June 16, 2015Assignee: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Peter Bermel, Ivan Celanovic, Marin Soljacic, Adrian Y. X. Yeng, Michael Ghebrebrhan, John D. Joannopoulos
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Publication number: 20140354071Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ?B2, and during the wireless energy transfers, adjusting at least one of the coupling rates ?1B and ?B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.Type: ApplicationFiled: August 13, 2014Publication date: December 4, 2014Inventors: Rafif E. Hamam, Aristeidis Karalis, John D. Joannopoulos, Marin Soljacic
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Patent number: 8836172Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ?B2, and during the wireless energy transfers, adjusting at least one of the coupling rates ?1B and ?B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.Type: GrantFiled: November 15, 2012Date of Patent: September 16, 2014Assignee: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Aristeidis Karalis, John D. Joannopoulos, Marin Soljacic
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Patent number: 8362651Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ?B2, and during the wireless energy transfers, adjusting at least one of the coupling rates ?1B and ?B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.Type: GrantFiled: October 1, 2009Date of Patent: January 29, 2013Assignee: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Aristeidis Karalis, John D. Joannopoulos, Marin Soljacic
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Publication number: 20120068549Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured for energy transfer with a second resonator structure over a distance D larger than characteristic sizes, L1 and L2, of the first and second resonator structures. A power generator is coupled to the first structure and configured to drive the first resonator structure or the second resonator structure at an angular frequency away from the resonance angular frequencies and shifted towards a frequency corresponding to an odd normal mode for the resonator structures to reduce radiation from the resonator structures by destructive far-field interference.Type: ApplicationFiled: November 3, 2011Publication date: March 22, 2012Inventors: Aristeidis Karalis, Rafif E. Hamam, John D. Joannopoulos, Marin Soljacic
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Publication number: 20120037217Abstract: 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: ApplicationFiled: July 19, 2011Publication date: February 16, 2012Applicant: Massachusetts Institute of TechnologyInventors: Rafif E. Hamam, Peter Bermel, Ivan Celanovic, Marin Soljacic, Adrian Y.X. Yeng, Michael Ghebrebrhan, John D. Joannopoulos
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Patent number: 8076801Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured for energy transfer with a second resonator structure over a distance D larger than characteristic sizes, L1 and L2, of the first and second resonator structures. A power generator is coupled to the first structure and configured to drive the first resonator structure or the second resonator structure at an angular frequency away from the resonance angular frequencies and shifted towards a frequency corresponding to an odd normal mode for the resonator structures to reduce radiation from the resonator structures by destructive far-field interference.Type: GrantFiled: May 14, 2009Date of Patent: December 13, 2011Assignee: Massachusetts Institute of TechnologyInventors: Aristeidis Karalis, Rafif E. Hamam, John D. Joannopoulos, Marin Soljacic
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Publication number: 20100148589Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ?B2, and during the wireless energy transfers, adjusting at least one of the coupling rates ?1B and ?B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.Type: ApplicationFiled: October 1, 2009Publication date: June 17, 2010Inventors: Rafif E. Hamam, Aristeidis Karalis, John D. Joannopoulos, Marin Soljacic
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Publication number: 20090284083Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured for energy transfer with a second resonator structure over a distance D larger than characteristic sizes, L1 and L2, of the first and second resonator structures. A power generator is coupled to the first structure and configured to drive the first resonator structure or the second resonator structure at an angular frequency away from the resonance angular frequencies and shifted towards a frequency corresponding to an odd normal mode for the resonator structures to reduce radiation from the resonator structures by destructive far-field interference.Type: ApplicationFiled: May 14, 2009Publication date: November 19, 2009Inventors: Aristeidis Karalis, Rafif E. Hamam, John D. Joannopoulos, Marin Soljacic
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Patent number: 7421171Abstract: A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical rectification. The photonic crystal structure is configured to have the suitable transverse dispersion relations and enhanced density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the photonic crystal.Type: GrantFiled: June 19, 2007Date of Patent: September 2, 2008Assignee: Massachusetts Institute of TechnologyInventors: Mihai Ibanescu, Evan Reed, Peter Rakich, Steven G. Johnson, Erich P. Ippen, John D. Joannopoulos, Marin Soljacic, Rafif E. Hamam
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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