Transition metal dichalcogenide coated flat optical devices having silicon-containing optical device structures

A device, comprising:

• a flat optical device operable to focus light incident on the flat optical device, wherein the flat optical device is a metasurface, the flat optical device comprising:
• a substrate comprising a transparent material;
• a plurality of optical device structures disposed in or on an upper surface of the substrate, wherein the plurality of optical device structures have a critical dimension less than 1 micron;
• and
• a coating layer disposed over each optical device structure of the plurality of optical device structures, the coating layer comprising:
• one or more monolayers, each monolayer of the one or more monolayers having a composition selected from the group consisting of molybdenum disulfide (MoS2), tungsten disulfide (WS2), tungsten diselenide (WSe2), molybdenum diselenide (MoSe2), molybdenum ditelluride (MoTe2), titanium disulfide (TiS2), zirconium disulfide (ZrS2), zirconium diselenide (ZrSe2), hafnium disulfide (HfS2), platinum disulfide (PtS2), tin disulfide (SnS2), or combinations thereof.

A device, comprising:

• a camera;
• and
• a flat optical device operable to focus light incident on the flat optical device to the camera, wherein the flat optical device is a metasurface, the flat optical device comprising:
• a substrate comprising a transparent material;
• a plurality of optical device structures disposed in or on an upper surface of the substrate;
• and
• a coating layer disposed over each optical device structure of the plurality of optical device structures, the coating layer comprising:
• one or more monolayers, each monolayer of the one or more monolayers having a composition selected from the group consisting of molybdenum disulfide (MoS2), tungsten disulfide (WS2), tungsten diselenide (WSe2), molybdenum diselenide (MoSe2), molybdenum ditelluride (MoTe2), titanium disulfide (TiS2), zirconium disulfide (ZrS2), zirconium diselenide (ZrSe2), hafnium disulfide (HfS2), platinum disulfide (PtS2), tin disulfide (SnS2), or combinations thereof.