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US 2019/0079321 A1Published application
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, having a first refractive index, 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, the dielectric layer is configured to change its refractive index to have at least one first layer having a refractive index higher than at least one second layer.
3 more elements
Dependencies are inferred from the claim text.