Patents by Inventor Anthony Grbic
Anthony Grbic 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: 11552204Abstract: An apparatus for light detection includes a light, or photon, detector assembly and a dielectric resonator layer coupled to the detector assembly. The dielectric resonator layer is configured to receive transmission of incident light that is directed into the detector assembly by the dielectric resonator layer. The dielectric resonator layer resonates with a range of wavelengths of the incident light.Type: GrantFiled: February 3, 2020Date of Patent: January 10, 2023Assignees: Ohio State Innovation Foundation, THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Sanjay Krishna, Anthony Grbic, Christopher Ball, Theodore Ronningen, Alireza Kazemi, Mohammadamin Ranjbaraskari, Qingyuan Shu
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Patent number: 11333798Abstract: A compound metaoptic is presented. The compound metaoptic is comprised of at least two phase-discontinuous metasurfaces, which can convert an incident light beam to an aperture field with a desired magnitude, phase, and polarization profile. Each of the constitutive metasurfaces is designed to exhibit specific refractive properties, which vary along the metasurface. Furthermore, due to its transmission-based operation, the metaoptic can operate without lenses and be low profile: potentially having a thickness on the order of a few wavelengths or less. A systematic design procedure is also presented, which allows conversion between arbitrary complex-valued field distributions without reflection, absorption or active components. Such compound metaoptics may find applications where a specific complex field distribution is desired, including displaying holographic images and augmented or virtual reality systems.Type: GrantFiled: July 3, 2019Date of Patent: May 17, 2022Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Brian Raeker, Anthony Grbic
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Publication number: 20220085474Abstract: Electromagnetic fields within a waveguide can be expressed in terms of the complex amplitudes of the electromagnetic modes it supports. The electromagnetic fields can be shaped by controlling the complex amplitudes of modes. Here, mode-converting metasurfaces are designed to transform a set of incident modes on one side to a different set of desired modes on the opposite side of the metasurface. A mode-converting metasurface comprises multiple inhomogeneous (spatially-varying) reactive electric sheets that are separated by dielectric spacers. The reactance profile of each electric sheet to perform the needed mode conversion is found through optimization. The optimization routine takes advantage of a multimodal solver that uses two main concepts: modal network theory and a discrete Fourier transform algorithm. With modal network theory, the modes can be translated between the electric sheets using matrix multiplication.Type: ApplicationFiled: September 14, 2021Publication date: March 17, 2022Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Faris ALSOLAMY, Anthony GRBIC
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Publication number: 20220066082Abstract: Transmissive and reflective all-dielectric metastructures are presented that offer tailored polarization conversions and spectral responses. The metastructures consist of stacked deeply subwavelength, high contrast gratings of different fill factors and rotations. Broadband metastructures that perform a given polarization conversion over a wide continuous bandwidth will be shown, as well as multiband metastructures that perform a common polarization conversion over different bands. Unlike conventional stacked grating geometries, the transmissive metastructures do not require antireflection layers since impedance matching is incorporated into their design. The subwavelength gratings are modeled as homogeneous anisotropic layers, allowing an overall metastructure to be treated as a stratified dielectric medium. Quasi-static analysis is used to homogenize the subwavelength gratings and represent them with effective dielectric constants.Type: ApplicationFiled: September 2, 2021Publication date: March 3, 2022Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Steve YOUNG, Anthony GRBIC, Moshen JAFARI
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Publication number: 20210063605Abstract: A compound metaoptic is presented. The compound metaoptic is comprised of at least two phase-discontinuous metasurfaces, which can convert an incident light beam to an aperture field with a desired magnitude, phase, and polarization profile. Each of the constitutive metasurfaces is designed to exhibit specific refractive properties, which vary along the metasurface. Furthermore, due to its transmission-based operation, the metaoptic can operate without lenses and be low profile: potentially having a thickness on the order of a few wavelengths or less. A systematic design procedure is also presented, which allows conversion between arbitrary complex-valued field distributions without reflection, absorption or active components. Such compound metaoptics may find applications where a specific complex field distribution is desired, including displaying holographic images and augmented or virtual reality systems.Type: ApplicationFiled: July 3, 2019Publication date: March 4, 2021Inventors: Brian RAEKER, Anthony GRBIC
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Publication number: 20200321481Abstract: An apparatus for light detection includes a light, or photon, detector assembly and a dielectric resonator layer coupled to the detector assembly. The dielectric resonator layer is configured to receive transmission of incident light that is directed into the detector assembly by the dielectric resonator layer. The dielectric resonator layer resonates with a range of wavelengths of the incident light.Type: ApplicationFiled: February 3, 2020Publication date: October 8, 2020Inventors: Sanjay Krishna, Anthony Grbic, Christopher Ball, Theodore Ronningen, Alireza Kazemi, Amin Ranjbar, Qingyuan Shu
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Patent number: 10114120Abstract: A near-field plate is a non-periodically patterned surface that can overcome the diffraction limit and confine electromagnetic fields to subwavelength dimensions. By controlling the interference of the electromagnetic fields radiated by the near-field plate with that of a source, the near-field plate can form a subwavelength near-field pattern in a forward direction, while suppressing fields in other directions, such as those reflected. The resulting unidirectional near-field plate may find utility in many applications such as high resolution imaging and probing, high density data storage, biomedical targeting devices, and wireless power transfer.Type: GrantFiled: April 15, 2015Date of Patent: October 30, 2018Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Seyedmohammadreza Faghih Imani
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Patent number: 9793720Abstract: A near-field plate is a non-periodically patterned surface that can overcome the diffraction limit and confine electromagnetic fields to subwavelength dimensions. By controlling the interference of the electromagnetic fields radiated by the near-field plate with that of a source, the near-field plate can form a subwavelength near-field pattern in a forward direction, while suppressing fields in other directions, such as those reflected. The resulting unidirectional near-field plate may find utility in many applications such as high resolution imaging and probing, high density data storage, biomedical targeting devices, and wireless power transfer.Type: GrantFiled: December 3, 2015Date of Patent: October 17, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Steve Young
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Patent number: 9744373Abstract: An improved apparatus is provided for transcranial magnetic stimulation in a brain of a subject. The apparatus is comprised of: a plurality of coils electrically connected in series to each other; and a single source of current electrically coupled to one of the plurality of coils. Each coil may include one or more windings of similar dimensions although the size of the windings varies between coils. Each of the coils is further dimensioned to stimulate brain tissue at a given distance while minimizing volume of the brain tissue excited by the magnetic field. During operation, the current source injects time varying current into the coils to create a magnetic field which in turn induces electric fields and eddy-currents inside the brain tissue of the subject.Type: GrantFiled: July 5, 2012Date of Patent: August 29, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Hernandez-Garcia, Anthony Grbic, Eric Michielssen, Luis Gomez
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Publication number: 20170038463Abstract: A near-field plate is a non-periodically patterned surface that can overcome the diffraction limit and confine electromagnetic fields to subwavelength dimensions. By controlling the interference of the electromagnetic fields radiated by the near-field plate with that of a source, the near-field plate can form a subwavelength near-field pattern in a forward direction, while suppressing fields in other directions, such as those reflected. The resulting unidirectional near-field plate may find utility in many applications such as high resolution imaging and probing, high density data storage, biomedical targeting devices, and wireless power transfer.Type: ApplicationFiled: April 15, 2015Publication date: February 9, 2017Inventors: Anthony Grbic, Seyedmohammadreza Faghih Imani
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Publication number: 20160087458Abstract: A near-field plate is a non-periodically patterned surface that can overcome the diffraction limit and confine electromagnetic fields to subwavelength dimensions. By controlling the interference of the electromagnetic fields radiated by the near-field plate with that of a source, the near-field plate can form a subwavelength near-field pattern in a forward direction, while suppressing fields in other directions, such as those reflected. The resulting unidirectional near-field plate may find utility in many applications such as high resolution imaging and probing, high density data storage, biomedical targeting devices, and wireless power transfer.Type: ApplicationFiled: December 3, 2015Publication date: March 24, 2016Inventors: Anthony Grbic, Steve Young
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Publication number: 20140364679Abstract: An improved apparatus is provided for transcranial magnetic stimulation in a brain of a subject. The apparatus is comprised of: a plurality of coils electrically connected in series to each other; and a single source of current electrically coupled to one of the plurality of coils. Each coil may include one or more windings of similar dimensions although the size of the windings varies between coils. Each of the coils is further dimensioned to stimulate brain tissue at a given distance while minimizing volume of the brain tissue excited by the magnetic field. During operation, the current source injects time varying current into the coils to create a magnetic field which in turn induces electric fields and eddy-currents inside the brain tissue of the subject.Type: ApplicationFiled: July 5, 2012Publication date: December 11, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Hernandez-Garcia, Anthony Grbic, Eric Michielssen, Luis Gomez
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Publication number: 20140266975Abstract: An antenna includes a dielectric substrate having a three-dimensional contour, and a set of antenna traces on the dielectric substrate. Each antenna trace spirals around the three-dimensional contour in a helical pattern. Each antenna trace includes a plated metallic layer.Type: ApplicationFiled: January 29, 2014Publication date: September 18, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Carl Pfeiffer, Xin Xu, Stephen Forrest
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Patent number: 8745853Abstract: Disclosed herein is a method of fabricating an antenna in which a flexible stamp is formed from a first wafer, the first wafer transferring a pattern to the flexible stamp, in which an antenna substrate is shaped into a three-dimensional contour with a second mold, in which the flexible stamp is positioned in the second mold to deform the flexible stamp into the three-dimensional contour, and in which a metallic layer on the flexible stamp is cold welded to create a set of antenna traces on the antenna substrate in accordance with the pattern. The antenna traces may then be electroplated.Type: GrantFiled: July 5, 2011Date of Patent: June 10, 2014Assignees: Universal Display Corporation, The Regents of the University of Michigan, University of Michigan Office of Technology TransferInventors: Anthony Grbic, Carl Pfeiffer, Xin Xu, Stephen Forrest
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Patent number: 8490035Abstract: Tensor transmission-line metamaterial unit cells are formed that allow the creation of any number of optic/electromagnetic devices. A desired electromagnetic distribution of the device is determined, from which effective material parameters capable of creating that desired distribution are obtained, for example, through a transformation optics/electromagnetics process. These effective material parameters are then linked to lumped or distributed circuit networks that achieve the desired distribution.Type: GrantFiled: November 12, 2010Date of Patent: July 16, 2013Assignee: The Regents of the University of MichiganInventors: Anthony Grbic, Gurkan Gok
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Publication number: 20120007791Abstract: Disclosed herein is a method of fabricating an antenna in which a flexible stamp is formed from a first wafer, the first wafer transferring a pattern to the flexible stamp, in which an antenna substrate is shaped into a three-dimensional contour with a second mold, in which the flexible stamp is positioned in the second mold to deform the flexible stamp into the three-dimensional contour, and in which a metallic layer on the flexible stamp is cold welded to create a set of antenna traces on the antenna substrate in accordance with the pattern. The antenna traces may then be electroplated.Type: ApplicationFiled: July 5, 2011Publication date: January 12, 2012Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Carl Pfeiffer, Xin Xu, Stephen Forrest
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Publication number: 20110303824Abstract: Planar sub-wavelength structures provide superlensing, i.e., electromagnetic focusing beyond the diffraction limit. The planar structures use diffraction to force the input field to converge to a spot on the focal plane. The sub-wavelength patterned structures manipulate the output wave in such a manner as to form a sub-wavelength focus in the near field. In some examples, the sub-wavelength structures may be linear grating-like structures that can focus electromagnetic radiation to lines of arbitrarily small sub-wavelength dimension, or two dimensional grating-like structures and Bessel (azimuthally symmetric) structures that can focus to spots of arbitrarily small sub-wavelength dimensions. The particular pattern for the sub-wavelength structures may be derived from the desired focus. Some examples describe sub-wavelength structures that have been implemented to focus microwave radiation to sub-wavelength dimensions in the near field.Type: ApplicationFiled: August 22, 2011Publication date: December 15, 2011Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Roberto D. Merlin
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Publication number: 20110209110Abstract: Tensor transmission-line metamaterial unit cells are formed that allow the creation of any number of optic/electromagnetic devices. A desired electromagnetic distribution of the device is determined, from which effective material parameters capable of creating that desired distribution are obtained, for example, through a transformation optics/electromagnetics process. These effective material parameters are then linked to lumped or distributed circuit networks that achieve the desired distribution.Type: ApplicationFiled: November 12, 2010Publication date: August 25, 2011Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Gurkan Gok
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Patent number: 8003965Abstract: Planar sub-wavelength structures provide superlensing, i.e., electromagnetic focusing beyond the diffraction limit. The planar structures use diffraction to force the input field to converge to a spot on the focal plane. The sub-wavelength patterned structures manipulate the output wave in such a manner as to form a sub-wavelength focus in the near field. In some examples, the sub-wavelength structures may be linear grating-like structures that can focus electromagnetic radiation to lines of arbitrarily small sub-wavelength dimension, or two dimensional grating-like structures and Bessel (azimuthally symmetric) structures that can focus to spots of arbitrarily small sub-wavelength dimensions. The particular pattern for the sub-wavelength structures may be derived from the desired focus. Some examples describe sub-wavelength structures that have been implemented to focus microwave radiation to sub-wavelength dimensions in the near field.Type: GrantFiled: May 19, 2008Date of Patent: August 23, 2011Assignee: The Regents of the University of MichiganInventors: Anthony Grbic, Roberto D. Merlin
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Publication number: 20090303154Abstract: Planar sub-wavelength structures provide superlensing, i.e., electromagnetic focusing beyond the diffraction limit. The planar structures use diffraction to force the input field to converge to a spot on the focal plane. The sub-wavelength patterned structures manipulate the output wave in such a manner as to form a sub-wavelength focus in the near field. In some examples, the sub-wavelength structures may be linear grating-like structures that can focus electromagnetic radiation to lines of arbitrarily small sub-wavelength dimension, or two dimensional grating-like structures and Bessel (azimuthally symmetric) structures that can focus to spots of arbitrarily small sub-wavelength dimensions. The particular pattern for the sub-wavelength structures may be derived from the desired focus. Some examples describe sub-wavelength structures that have been implemented to focus microwave radiation to sub-wavelength dimensions in the near field.Type: ApplicationFiled: May 19, 2008Publication date: December 10, 2009Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Anthony Grbic, Roberto D. Merlin