Patents by Inventor Evgueni E. Narimanov
Evgueni E. Narimanov 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: 10067326Abstract: An electromagnetic black hole may be fabricated as concentric shells having a permittivity whose variation is at least as great as an inverse square dependence on the radius of the structure. Such a structure concentrates electromagnetic energy incident thereon over a broad range of angles to an operational region near the center of curvature of the structure. Devices or materials may be placed in the operational region so as to convert the electromagnetic energy to electrical signals or to heat. Applications included solar energy harvesting and heat signature detectors.Type: GrantFiled: January 4, 2016Date of Patent: September 4, 2018Assignee: PURDUE RESEARCH FOUNDATIONInventors: Alexander V. Kildishev, Evgueni E. Narimanov
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Publication number: 20160147052Abstract: An electromagnetic black hole may be fabricated as concentric shells having a permittivity whose variation is at least as great as an inverse square dependence on the radius of the structure. Such a structure concentrates electromagnetic energy incident thereon over a broad range of angles to an operational region near the center of curvature of the structure. Devices or materials may be placed in the operational region so as to convert the electromagnetic energy to electrical signals or to heat. Applications included solar energy harvesting and heat signature detectors.Type: ApplicationFiled: January 4, 2016Publication date: May 26, 2016Applicant: Purdue Research FoundationInventors: Alexander V. Kildishev, Evgueni E. Narimanov
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Patent number: 9322953Abstract: An indefinite metamaterial where the surface or immediate subsurface region is roughened or disordered has improved coupling of electromagnetic waves incident on the medium. This also means that the amount of energy reflected by the material is reduced. Such a reduction in reflection may reduce the radar observability of a structure with a metamaterial surface, or increase the amount of energy coupled to a detector. An indefinite metamaterial has at least one of the components of the permittivity tensor that is different in sign from the other axes, and in a uniaxial indefinite material this differing axis is oriented perpendicular to the surface of the material. The disorder has scale dimensions of the order of a wavelength and may be random or periodic.Type: GrantFiled: May 18, 2011Date of Patent: April 26, 2016Assignee: PURDUE RESEARCH FOUNDATIONInventor: Evgueni E. Narimanov
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Patent number: 9228761Abstract: An electromagnetic black hole may be fabricated as concentric shells having a permittivity whose variation is at least as great as an inverse square dependence on the radius of the structure. Such a structure concentrates electromagnetic energy incident thereon over a broad range of angles to an operational region near the center of curvature of the structure. Devices or materials may be placed in the operational region so as to convert the electromagnetic energy to electrical signals or to heat. Applications included solar energy harvesting and heat signature detectors.Type: GrantFiled: July 26, 2011Date of Patent: January 5, 2016Assignee: PURDUE RESEARCH FOUNDATIONInventors: Alexander V. Kildishev, Evgueni E. Narimanov
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Publication number: 20120305802Abstract: Nanoparticles with a metal or metallic core and an outer shell comprising a matrix and a dopant. For example, a nanoparticle can have a gold core and outer shell comprising silica and an organic dye. Such nanoparticles can have use in, for example, optical communication applications, chemical and biosensing applications, and imaging applications.Type: ApplicationFiled: August 11, 2010Publication date: December 6, 2012Inventors: Erik Herz, Andrew Burns, Ulrich B. Wiesner, Mikhail A. Noginov, Samantha Stout, Akeisha Belgrave, Guohua Zhu, Vladimir M. Shalaev, Evgueni E. Narimanov
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Publication number: 20120028007Abstract: An electromagnetic black hole may be fabricated as concentric shells having a permittivity whose variation is at least as great as an inverse square dependence on the radius of the structure. Such a structure concentrates electromagnetic energy incident thereon over a broad range of angles to an operational region near the center of curvature of the structure. Devices or materials may be placed in the operational region so as to convert the electromagnetic energy to electrical signals or to heat. Applications included solar energy harvesting and heat signature detectors.Type: ApplicationFiled: July 26, 2011Publication date: February 2, 2012Inventors: Alexander V. Kildishev, Evgueni E. Narimanov
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Publication number: 20110287218Abstract: An indefinite metamaterial where the surface or immediate subsurface region is roughened or disordered has improved coupling of electromagnetic waves incident on the medium. This also means that the amount of energy reflected by the material is reduced. Such a reduction in reflection may reduce the radar observability of a structure with a metamaterial surface, or increase the amount of energy coupled to a detector. An indefinite metamaterial has at least one of the components of the permittivity tensor that is different in sign from the other axes, and in a uniaxial indefinite material this differing axis is oriented perpendicular to the surface of the material. The disorder has scale dimensions of the order of a wavelength and may be random or periodic.Type: ApplicationFiled: May 18, 2011Publication date: November 24, 2011Inventor: Evgueni E. Narimanov
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Patent number: 7421178Abstract: Disclosed herein are exemplary embodiments of materials and structures that have a negative refractive index. For example, one exemplary embodiment is a waveguide structure comprising a first waveguide border element having a first substantially planar surface, and a second waveguide border element spaced apart from the first waveguide border element and having a second substantially planar surface. This exemplary embodiment further comprises a core material positioned between the first substantially planar surface and the second substantially planar surface. The core material has a positive in-plane dielectric constant and a negative perpendicular-to-plane dielectric constant. Furthermore, the first waveguide border element, the second waveguide border element, and the core material form a waveguide exhibiting a negative index of refraction for electromagnetic radiation in a frequency range.Type: GrantFiled: May 12, 2006Date of Patent: September 2, 2008Inventors: Viktor A. Podolskiy, Evgueni E. Narimanov
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Patent number: 6882675Abstract: A compact optical resonator that exhibits long TOPLs is fabricated by (a) selecting a 3-dimensional (3D) reflective, essentially closed surface such that the paths of optical rays that reflect from the interior of the surface include chaotic, open paths; (b) determining the phase-space of the reflection points of the rays; (c) within the phase-space identifying at least one forbidden zone where there are no such reflection points and at least one allowed zone where there is a multiplicity of such reflection points; (d) forming the surface inside a rigid body; and (e) forming at least one physical feature that communicates with the interior of the resonator and is located in a region of the surface that is determined by the positions of the forbidden zones, the allowed zones, or both. In a preferred embodiment physical features such as gas ports are located in regions of the surface that, in phase space, correspond to forbidden zones (so that the circulating optical rays cannot escape via the gas ports).Type: GrantFiled: April 15, 2003Date of Patent: April 19, 2005Assignee: Lucent Technologies Inc.Inventors: Claire F. Gmachl, Evgueni E. Narimanov
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Publication number: 20040208220Abstract: A compact optical resonator that exhibits long TOPLs is fabricated by (a) selecting a 3-dimensional (3D) reflective, essentially closed surface such that the paths of optical rays that reflect from the interior of the surface include chaotic, open paths; (b) determining the phase-space of the reflection points of the rays; (c) within the phase-space identifying at least one forbidden zone where there are no such reflection points and at least one allowed zone where there is a multiplicity of such reflection points ; (d) forming the surface inside a rigid body; and (e) forming at least one physical feature that communicates with the interior of the resonator and is located in a region of the surface that is determined by the positions of the forbidden zones, the allowed zones, or both. In a preferred embodiment physical features such as gas ports are located in regions of the surface that, in phase space, correspond to forbidden zones (so that the circulating optical rays cannot escape via the gas ports).Type: ApplicationFiled: April 15, 2003Publication date: October 21, 2004Inventors: Claire F. Gmachl, Evgueni E. Narimanov
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Patent number: 6333944Abstract: A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive index (n>2 and typically n>3) is sufficiently deformed from circularity so as to support at least one librational mode (e.g., a V-shaped or a bow-tie mode, the latter being presently preferred for generating relatively high power, directional outputs). Specifically described is a Group III-V compound semiconductor, quantum cascade (QC), micro-cylinder laser in which the resonator has a flattened quadrupolar deformation from circularity. This laser exhibits both a highly directional output emission and a three-order of magnitude increase in optical output power compared to conventional semiconductor micro-cylinder QC lasers having circularly symmetric resonators.Type: GrantFiled: June 12, 2000Date of Patent: December 25, 2001Assignee: Yale UniversityInventors: Federico Capasso, Alfred Yi Cho, Claire F. Gmachl, Deborah Lee Sivco, Evgueni E. Narimanov, Alfred Douglas Stone
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Patent number: 6134257Abstract: A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive index (n>2 and typically n>3) is sufficiently deformed from circularity so as to support at least one librational mode (e.g., a V-shaped or a bow-tie mode, the latter being presently preferred for generating relatively high power, directional outputs). Specifically described is a Group III-V compound semiconductor, quantum cascade (QC), micro-cylinder laser in which the resonator has a flattened quadrupolar deformation from circularity. This laser exhibits both a highly directional output emission and a three-order of magnitude increase in optical output power compared to conventional semiconductor micro-cylinder QC lasers having circularly symmetric resonators.Type: GrantFiled: April 21, 1998Date of Patent: October 17, 2000Assignee: Lucent Technologies Inc.Inventors: Federico Capasso, Alfred Yi Cho, Jerome Faist, Claire F. Gmachl, Deborah Lee Sivco, Evgueni E. Narimanov, Alfred Douglas Stone, Jens Uwe Noeckel