-
公开(公告)号：US20180337324A1
公开(公告)日：2018-11-22
申请号：US15983928
申请日：2018-05-18
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong , Thomas A. Ohki
IPC: H01L39/24 , H01L39/22 , H01L31/0352
CPC classification number: H01L39/2493 , G01J5/20 , H01L31/0352 , H01L39/10 , H01L39/223 , H01L39/228
Abstract: A photon detector including a graphene-insulating-superconducting junction configured as a temperature sensor. Photons are absorbed by the graphene sheet of the graphene-insulating-superconducting junction, each absorbed photon causing a temporary increase in the temperature of the graphene sheet, and a corresponding change in the differential impedance of the graphene-insulating-superconducting junction. The graphene-insulating-superconducting junction is part of a resonant circuit connected as a shunt load between a radio frequency input transmission line and a radio frequency output transmission line. The transmission S-parameter from input to output is affected by the impedance of the resonant circuit which in turn is affected by the differential impedance of the graphene-insulating-superconducting junction, and therefore by the temperature of the graphene sheet. The absorption of photons is detected by detecting changes in the transmission S-parameter indicating temperature changes caused by the absorption of a photon.
-
公开(公告)号：US09869592B2
公开(公告)日：2018-01-16
申请号：US15653466
申请日：2017-07-18
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
IPC: G01J5/08
CPC classification number: G01J5/0806 , G01J1/42 , G01J1/44 , G01J5/0803 , G01J5/0818 , G01J5/0837 , G01J5/20 , G01J2005/106 , H01L29/1606
Abstract: A bolometer. In one embodiment a graphene sheet is configured to absorb electromagnetic waves. The graphene sheet has two contacts connected to an amplifier, and a power detector connected to the amplifier. Electromagnetic power in the evanescent electromagnetic waves is absorbed in the graphene sheet, heating the graphene sheet. The power of Johnson noise generated at the contacts is proportional to the temperature of the graphene sheet. The Johnson noise is amplified and the power in the Johnson noise is used as a measure of the temperature of the graphene sheet, and of the amount of electromagnetic wave power absorbed by the graphene sheet.
-
公开(公告)号：US11537822B2
公开(公告)日：2022-12-27
申请号：US16420100
申请日：2019-05-22
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong , Man-Hung Siu , Zhuolin Jiang
Abstract: A method for classifying images of oligolayer exfoliation attempts. In some embodiments, the method includes forming a micrograph of a surface, and classifying the micrograph into one of a plurality of categories. The categories may include a first category, consisting of micrographs including at least one oligolayer flake, and a second category, consisting of micrographs including no oligolayer flakes, the classifying comprising classifying the micrograph with a neural network.
-
公开(公告)号：US20220393090A1
公开(公告)日：2022-12-08
申请号：US17886283
申请日：2022-08-11
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
Abstract: A tunable oscillator including a Josephson junction. In some embodiments, the tunable oscillator includes a first superconducting terminal, a second superconducting terminal, a graphene channel including a portion of a graphene sheet, and a conductive gate. The first superconducting terminal, the second superconducting terminal, and the graphene channel together may form a Josephson junction having an oscillation frequency, and the conductive gate may be configured, upon application of a voltage across the conductive gate and the graphene channel, to modify the oscillation frequency.
-
公开(公告)号：US11451204B2
公开(公告)日：2022-09-20
申请号：US16796871
申请日：2020-02-20
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong , Guilhem Ribeill , Luke Colin Gene Govia , Martin Gustafsson , Thomas A. Ohki
Abstract: An amplifier. In some embodiments, the amplifier includes a resonant circuit having a resonant frequency, a pump input, a signal input, and a signal output. The resonant circuit may include a Josephson junction connected to the pump input, the Josephson junction being a superconducting-normal-superconducting junction having two superconducting terminals and being configured to adjust the resonant frequency of the resonant circuit based on a signal received at the pump input.
-
Patent Agency Ranking
公开(公告)号：US20220223780A1
公开(公告)日：2022-07-14
申请号：US17147387
申请日：2021-01-12
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
Abstract: A tunable oscillator including a Josephson junction. In some embodiments, the tunable oscillator includes a first superconducting terminal, a second superconducting terminal, a graphene channel including a portion of a graphene sheet, and a conductive gate. The first superconducting terminal, the second superconducting terminal, and the graphene channel together may form a Josephson junction having an oscillation frequency, and the conductive gate may be configured, upon application of a voltage across the conductive gate and the graphene channel, to modify the oscillation frequency.
-
公开(公告)号：US20180356289A1
公开(公告)日：2018-12-13
申请号：US16001844
申请日：2018-06-06
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
CPC classification number: G01J5/0806 , G01J1/42 , G01J1/44 , G01J5/0803 , G01J5/0818 , G01J5/0837 , G01J5/20 , G01J2005/106 , H01L29/1606
Abstract: A bolometer. In one embodiment a graphene sheet is configured to absorb electromagnetic waves. The graphene sheet has two contacts connected to an amplifier, and a power detector connected to the amplifier. Electromagnetic power in the evanescent electromagnetic waves is absorbed in the graphene sheet, heating the graphene sheet. The power of Johnson noise generated at the contacts is proportional to the temperature of the graphene sheet. The Johnson noise is amplified and the power in the Johnson noise is used as a measure of the temperature of the graphene sheet, and of the amount of electromagnetic wave power absorbed by the graphene sheet.
-
公开(公告)号：US10024721B2
公开(公告)日：2018-07-17
申请号：US15869725
申请日：2018-01-12
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
IPC: G01J5/08
Abstract: A bolometer. In one embodiment a graphene sheet is configured to absorb electromagnetic waves. The graphene sheet has two contacts connected to an amplifier, and a power detector connected to the amplifier. Electromagnetic power in the evanescent electromagnetic waves is absorbed in the graphene sheet, heating the graphene sheet. The power of Johnson noise generated at the contacts is proportional to the temperature of the graphene sheet. The Johnson noise is amplified and the power in the Johnson noise is used as a measure of the temperature of the graphene sheet, and of the amount of electromagnetic wave power absorbed by the graphene sheet.
-
公开(公告)号：US09945728B2
公开(公告)日：2018-04-17
申请号：US14793418
申请日：2015-07-07
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
CPC classification number: G01J5/22 , G01J1/42 , G01J5/0818 , G01J5/20 , G01J5/24 , H01L29/1606 , H01L31/02327
Abstract: A detector for detecting single photons of infrared radiation. In one embodiment a waveguide configured to transmit infrared radiation is arranged to be adjacent a graphene sheet and configured so that evanescent waves from the waveguide overlap the graphene sheet. The graphene sheet has two contacts connected to an amplifier, a power detector, and a pulse detector. An infrared photon absorbed by the graphene sheet from the evanescent waves heats the graphene sheet, which increases the Johnson noise generated at the contacts. The Johnson noise is amplified and the absorption of a photon is detected by the power detector and pulse detector.
-
公开(公告)号：US09933310B2
公开(公告)日：2018-04-03
申请号：US14794591
申请日：2015-07-08
Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
Inventor： Kin Chung Fong
CPC classification number: G01J5/0818 , G01J1/42 , G01J1/44 , G01J5/20 , G01J2005/106 , H01L29/1606
Abstract: An infrared bolometer. In one embodiment a waveguide configured to transmit infrared radiation is arranged to be adjacent a graphene sheet and configured so that evanescent waves from the waveguide overlap the graphene sheet. The graphene sheet has two contacts connected to an amplifier, and a power detector connected to the amplifier. Infrared electromagnetic power in the evanescent waves is absorbed in the graphene sheet, heating the graphene sheet. The power of Johnson noise generated at the contacts is proportional to the temperature of the graphene sheet. The Johnson noise is amplified and the power in the Johnson noise is used as a measure of the temperature of the graphene sheet, and of the amount of infrared power propagating in the waveguide.
-
-
-
-
-
-
-
-
-
Search Results
32
records
(took 0.015 seconds)
