Patents by Inventor Ragip PALA
Ragip PALA 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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Publication number: 20240079791Abstract: There is provided an electromagnetic wave director comprising a substrate supporting a diffractive element formed from a two-dimensional array of subwavelength subcells deposited onto said substrate, said diffractive element operative to direct an electromagnetic wave signal generated by at least one electromagnetic wave transmitter to at least one electromagnetic receiver disposed within at least one coverage zone lying outside the line of sight of the transmitter, said diffractive element having metasurface prescription for modifying the amplitude and phase of incident electromagnetic wavefronts on each subwavelength subcell. There is also provided associated systems and methods.Type: ApplicationFiled: September 8, 2023Publication date: March 7, 2024Inventors: Ragip Pala, Jonathan Waldern, Efthymios Kallos, Milan Momcilo Popovich, George Palikaras
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Patent number: 11835626Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.Type: GrantFiled: September 19, 2022Date of Patent: December 5, 2023Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Muhammad Alam, Harry Atwater, Ragip Pala, Byunghoon Na, Seunghoon Han
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Publication number: 20230036961Abstract: A microwave device includes a microwave cavity, a frame, and a window having an electrically insulating substrate and a structure of metallic wires supported by the substrate. The frame defines a perimeter of an opening in the microwave cavity and the frame is conductive and grounded. The window spans the opening and is arranged to reflect RF radiation back into the cavity and to shield the outside of the microwave cavity from RF radiation. The window is optically transparent. Each metallic wire of the structure is electrically connected to the frame and the width of each metallic wire is between 100 nanometres and 30 micrometres.Type: ApplicationFiled: July 20, 2021Publication date: February 2, 2023Inventors: Ragip Pala, Yaroslav Urzhumov
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Publication number: 20230016681Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.Type: ApplicationFiled: September 19, 2022Publication date: January 19, 2023Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Muhammad ALAM, Harry ATWATER, Ragip PALA, Byunghoon NA, Seunghoon HAN
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Patent number: 11513219Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.Type: GrantFiled: May 27, 2020Date of Patent: November 29, 2022Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Muhammad Alam, Harry Atwater, Ragip Pala, Byunghoon Na, Seunghoon Han
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Patent number: 11204514Abstract: Provided is a quantum dot (QD) light modulator and an apparatus including the QD light modulator. The QD light modulator may include a QD-containing layer including QDs having light-emission characteristics, a refractive index change layer arranged adjacent to the QD-containing layer, and a reflector arranged facing the QD-containing layer. The refractive index change layer may include a carrier density change area in which a carrier density changes, and the carrier density change area may be arranged adjacent to the QD-containing layer. The light-emission characteristics of the QD-containing layer may be modulated according to a change in a property of the refractive index change layer. The QD light modulator may further include a nano-antenna structure arranged on the QD-containing layer.Type: GrantFiled: October 10, 2018Date of Patent: December 21, 2021Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Ruzan Sokhoyan, Yu-Jung Lu, Ghazaleh Kafaie Shirmanesh, Harry Atwater, Ragip Pala, Chanwook Baik
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Patent number: 11108213Abstract: A light modulation element according to example embodiments includes a substrate; a first lower DBR layer on the substrate including a first material layer alternately stacked with a second material layer having a different refractive index from the first material layer; a second lower DBR layer on the first lower DBR layer with a surface area less than the first lower DBR layer and including a third material layer alternately stacked with a fourth material layer having a different refractive index from the third material layer; an active layer on the second lower DBR layer, including a semiconductor material having a multi-quantum well structure and having a refractive index that varies according to an applied voltage; and an upper DBR layer on the active layer including a fifth material layer alternately stacked with a sixth material layer having a different refractive index from the fifth material layer.Type: GrantFiled: February 28, 2020Date of Patent: August 31, 2021Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Muhammad Alam, Ghazaleh Kafaie Shirmanesh, Harry Atwater, Pin Chieh Wu, Ragip Pala
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Patent number: 10950749Abstract: Provided are light emission devices including an output coupler and optical apparatuses having the same. The light emission device may include a QD layer containing quantum dots and a nano-antenna structure including an output coupler configured to control an output characteristic of light emitted from the QD layer. The output coupler may be configured to output an emission wavelength of the QD layer. The nano-antenna structure may include one of a metallic antenna, a dielectric antenna, and a slit-containing structure, or may have a multi-patch antenna structure or a fishbone antenna structure.Type: GrantFiled: October 30, 2018Date of Patent: March 16, 2021Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Ruzan Sokhoyan, Yu-Jung Lu, Ghazaleh Kafaie Shirmanesh, Harry A. Atwater, Ragip A. Pala, Chan-Wook Baik
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Patent number: 10921618Abstract: An optical modulating device may include a plurality of quantum dot (QD)-containing layers having QDs and a plurality of refractive index change layers. The QD-containing layers may be disposed between the refractive index change layers, respectively. The optical modulating device may be configured to modulate light-emission characteristics of the plurality of QD-containing layers. At least two of the QD-containing layers may have different central emission wavelengths. At least two of the plurality of refractive index change layers may include different materials or have different carrier densities.Type: GrantFiled: October 25, 2018Date of Patent: February 16, 2021Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun Lee, Ruzan Sokhoyan, Yu-Jung Lu, Ghazaleh Kafaie Shirmanesh, Harry Atwater, Ragip Pala, Chanwook Baik
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Publication number: 20200284904Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.Type: ApplicationFiled: May 27, 2020Publication date: September 10, 2020Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Muhammad ALAM, Harry ATWATER, Ragip PALA, Byunghoon NA, Seunghoon HAN
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Publication number: 20200280174Abstract: A light modulation element according to example embodiments includes a substrate; a first lower DBR layer on the substrate including a first material layer alternately stacked with a second material layer having a different refractive index from the first material layer; a second lower DBR layer on the first lower DBR layer with a surface area less than the first lower DBR layer and including a third material layer alternately stacked with a fourth material layer having a different refractive index from the third material layer; an active layer on the second lower DBR layer, including a semiconductor material having a multi-quantum well structure and having a refractive index that varies according to an applied voltage; and an upper DBR layer on the active layer including a fifth material layer alternately stacked with a sixth material layer having a different refractive index from the fifth material layer.Type: ApplicationFiled: February 28, 2020Publication date: September 3, 2020Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Muhammad ALAM, Ghazaleh KAFAIE SHIRMANESH, Harry ATWATER, Pin Chieh WU, Ragip PALA
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Patent number: 10520758Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.Type: GrantFiled: June 7, 2018Date of Patent: December 31, 2019Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Seunghoon Han, Ruzan Sokhoyan, Harry Atwater, Ghazaleh Kafaie, Ragip Pala, Yu-Jung Lu, Ho Wai Lee, Yao-Wei Huang, Krishnan Thyagarajan
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Patent number: 10444355Abstract: Provided are an optical modulating device and a system employing the same. The optical modulating device includes a phase modulator including a meta surface including a nanoantenna configured to couple light incident on the phase modulator, and including a quantum well layer having a multi-quantum well and configured to modulate a phase of light by modulating a refractive index according to an electrical control, and a reflective layer provided at on the phase modulator opposite to a side of the meta surface of the phase modulator and configured to resonate light coupled through the nanoantenna.Type: GrantFiled: January 10, 2018Date of Patent: October 15, 2019Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Ragip Pala, Harry Atwater, Muhammad Alam, Duhyun Lee, Byunghoon Na, Seunghoon Han
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Publication number: 20190129206Abstract: An optical modulating device may include a plurality of quantum dot (QD)-containing layers having QDs and a plurality of refractive index change layers. The QD-containing layers may be disposed between the refractive index change layers, respectively. The optical modulating device may be configured to modulate light-emission characteristics of the plurality of QD-containing layers. At least two of the QD-containing layers may have different central emission wavelengths. At least two of the plurality of refractive index change layers may include different materials or have different carrier densities.Type: ApplicationFiled: October 25, 2018Publication date: May 2, 2019Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh KAFAIE SHIRMANESH, Harry ATWATER, Ragip PALA, Chanwook BAIK
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Publication number: 20190131491Abstract: Provided are light emission devices including an output coupler and optical apparatuses having the same. The light emission device may include a QD layer containing quantum dots and a nano-antenna structure including an output coupler configured to control an output characteristic of light emitted from the QD layer. The output coupler may be configured to output an emission wavelength of the QD layer. The nano-antenna structure may include one of a metallic antenna, a dielectric antenna, and a slit-containing structure, or may have a multi-patch antenna structure or a fishbone antenna structure.Type: ApplicationFiled: October 30, 2018Publication date: May 2, 2019Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh KAFAIE SHIRMANESH, Harry A. ATWATER, Ragip A. PALA, Chan-Wook BAIK
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Publication number: 20190107740Abstract: Provided is a quantum dot (QD) light modulator and an apparatus including the QD light modulator. The QD light modulator may include a QD-containing layer including QDs having light-emission characteristics, a refractive index change layer arranged adjacent to the QD-containing layer, and a reflector arranged facing the QD-containing layer. The refractive index change layer may include a carrier density change area in which a carrier density changes, and the carrier density change area may be arranged adjacent to the QD-containing layer. The light-emission characteristics of the QD-containing layer may be modulated according to a change in a property of the refractive index change layer. The QD light modulator may further include a nano-antenna structure arranged on the QD-containing layer.Type: ApplicationFiled: October 10, 2018Publication date: April 11, 2019Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh Kafaie SHIRMANESH, Harry ATWATER, Ragip PALA, Chanwook BAIK
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Publication number: 20180292681Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.Type: ApplicationFiled: June 7, 2018Publication date: October 11, 2018Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Seunghoon HAN, Ruzan SOKHOYAN, Harry ATWATER, Ghazaleh KAFAIE, Ragip PALA, Yu-Jung LU, Ho Wai LEE, Yao-Wei HUANG, Krishnan THYAGARAJAN
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Publication number: 20180196137Abstract: Provided are an optical modulating device and a system employing the same. The optical modulating device includes a phase modulator including a meta surface including a nanoantenna configured to couple light incident on the phase modulator, and including a quantum well layer having a multi-quantum well and configured to modulate a phase of light by modulating a refractive index according to an electrical control, and a reflective layer provided at on the phase modulator opposite to a side of the meta surface of the phase modulator and configured to resonate light coupled through the nanoantenna.Type: ApplicationFiled: January 10, 2018Publication date: July 12, 2018Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Ragip PALA, Harry ATWATER, Muhammad ALAM, Byunghoon NA, Seunghoon HAN
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Publication number: 20180196138Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.Type: ApplicationFiled: January 10, 2018Publication date: July 12, 2018Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Duhyun LEE, Muhammad ALAM, Harry ATWATER, Ragip PALA, Byunghoon NA, Seunghoon HAN
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Patent number: 10012851Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.Type: GrantFiled: July 20, 2016Date of Patent: July 3, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Seunghoon Han, Ruzan Sokhoyan, Harry Atwater, Ghazaleh Kafaie, Ragip Pala, Yu-Jung Lu, Ho Wai Lee, Yao-Wei Huang, Krishnan Thyagarajan