Patent ID: 9244268
Filing Date: 2016-01-26
CPC Classification: B82Y,G01J,G02B,G02F,Y10S

Claim Text:
1. An actively tunable optical sensor, comprising: a plurality of nanoantennas fabricated from a first polar-dielectric material configured to exhibit surface polar phonon polaritons (SPhPs) when the material is illuminated by an infrared optical probe beam having at least one wavelength within a Reststrahlen band of the polar-dielectric material, the nanoantennas having a resonant wavelength λ a probe beam source configured to provide the infrared optical probe beam to the plurality of nanoantennas; and a source of charge carriers controllably coupled to at least some of the nanoantennas; wherein the value of the resonant wavelength λ wherein the tuning of the resonant wavelength λ