Narrowband sensors based on plasmonic metasurfaces integrated on piezoelectric plates

An optical device, comprising:

• a plasmonic metasurface configured to absorb an incident light having a frequency spectrum, wherein the incident light is modulated in time;
• a first metal layer coupled to the plasmonic metasurface;
• a piezoelectric layer coupled to the first metal layer;
• a second metal layer coupled to the plasmonic metasurface;
• and
• a voltage detector coupled to the first metal layer and second metal layer, the voltage detector configured to detect an amplitude of an electrical signal modulated in time according to the modulated incident light.

A light detector system, comprising:

• a light source configured to emit light having a frequency spectrum, wherein the light is modulated in time;
• and
• an optical detector configured to detect an intensity of the light at a wavelength range within the frequency spectrum, wherein the optical detector comprises:
• a piezoelectric layer;
• a first metal layer coupled to a first surface of the piezoelectric layer;
• a second metal layer coupled to a second surface of the piezoelectric layer;
• a plasmonic metasurface coupled to the first metal layer and configured to absorb the light at the wavelength range, wherein the plasmonic metasurface comprises metal structures and a dielectric layer disposed on the first metal layer;
• and
• a voltage detector coupled to the first metal layer and the second metal layer, the voltage detector configured to detect a voltage at a frequency of the modulated light.