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US 10,802,301 B2Granted
Active metasurfaces for dynamic polarization conversion
AssigneeCalifornia Institute of Technology
InventorsPin Chieh Wu, Ruzan Sokhoyan, Ghazaleh Kafaie Shirmanesh, Harry A. Atwater
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Abstract
The optical response of a metasurface is controlled by actuating it via an electrical or magnetic field, temperature control, optical pumping or electromechanical actuation. The metasurface will therefore control the polarization of the incident light. The metasurface comprises an array of patch antennas. The patch antennas are in the form of asymmetrical elements, including rotated rods, cross-shapes, V-shapes, and L-shapes.
Claims19
A structure comprising:
- a first electrode transparent to incident electromagnetic radiation;
- a second electrode;
- a dielectric layer disposed between the first electrode and the second electrode;
- and
- an array of elements on a surface of the first electrode opposite to the dielectric layer,
- wherein upon application of a control signal to the array of elements, the first electrode is configured to change its refractive index to have at least one first region of the first electrode having a refractive index higher than at least one second region of the first electrode.
3 more elements
Dependencies are inferred from the claim text.