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公开(公告)号：US11159059B2
公开(公告)日：2021-10-26
申请号：US16691202
申请日：2019-11-21
Applicant: University of Washington
Inventor： Shyamnath Gollakota , Vikram Subramaniam Iyer , Arka Majumdar , Elyas Bayati , Rajalakshmi Nandakumar
Abstract: Systems and methods for wirelessly transmitting power across a room or space are disclosed herein. One such system is comprised of a power receiving element positioned to receive wireless power transfer, comprised of a power receiving cell and a retroreflector positioned proximate the power receiving cell, and a power transmission element configured to wirelessly transmit power towards the power receiving element. The power transmission element includes an optical power transmitter configured to emit a first laser beam with a first power density towards the receiving cell, a guard beam emitter positioned proximate the optical power transmitter and configured to emit a second laser beam with a second power density towards the retroreflectors, a light detector positioned proximate the guard beam emitter and configured to detect light reflected by the retroreflectors, and an interlock system configured to interrupt power transmission when a decrease in light incident from the retroreflectors is detected.
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公开(公告)号：US20200241182A1
公开(公告)日：2020-07-30
申请号：US16850966
申请日：2020-04-16
Applicant: University of Washington
Inventor： Alan Zhan , Shane Colburn , Arka Majumdar
Abstract: Disclosed herein are metasurfaces formed on a substrate from a plurality of posts. The metasurfaces are configured to be optically active at one or more wavelengths and in certain embodiments are configured to form lenses having unexpectedly strong focusing power. In particular, the metasurfaces are formed from “low-contrast” materials, including CMOS-compatible materials such as silicon dioxide or silicon nitride. Accordingly, the disclosed metasurfaces are generally CMOS compatible and therefore embody a new paradigm in metasurface design and manufacturing.
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公开(公告)号：US20200161904A1
公开(公告)日：2020-05-21
申请号：US16691202
申请日：2019-11-21
Applicant: University of Washington
Inventor： Shyamnath Gollakota , Vikram Subramaniam Iyer , Arka Majumdar , Elyas Bayati , Rajalakshmi Nandakumar
Abstract: Systems and methods for wirelessly transmitting power across a room or space are disclosed herein. One such system is comprised of a power receiving element positioned to receive wireless power transfer, comprised of a power receiving cell and a retroreflector positioned proximate the power receiving cell, and a power transmission element configured to wirelessly transmit power towards the power receiving element. The power transmission element includes an optical power transmitter configured to emit a first laser beam with a first power density towards the receiving cell, a guard beam emitter positioned proximate the optical power transmitter and configured to emit a second laser beam with a second power density towards the retroreflectors, a light detector positioned proximate the guard beam emitter and configured to detect light reflected by the retroreflectors, and an interlock system configured to interrupt power transmission when a decrease in light incident from the retroreflectors is detected.
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公开(公告)号：US20200057182A1
公开(公告)日：2020-02-20
申请号：US16523868
申请日：2019-07-26
Applicant: University of Washington
Inventor： Alan Zhan , Shane Colburn , Arka Majumdar
Abstract: Disclosed herein are metasurfaces formed on a substrate from a plurality of posts. The metasurfaces are configured to be optically active at one or more wavelengths and in certain embodiments are configured to form lenses having unexpectedly strong focusing power. In particular, the metasurfaces are formed from “low-contrast” materials, including CMOS-compatible materials such as silicon dioxide or silicon nitride. Accordingly, the disclosed metasurfaces are generally CMOS compatible and therefore embody a new paradigm in metasurface design and manufacturing.
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