Patent ID: 9547107
Date: 2017-01-17
CPC Classifications: B82Y,G02B,Y10S

Claim:
1. A transmission-type angle insensitive optical spectrum filtering device comprising: a localized plasmonic nanoresonator assembly comprising a multi-layered metal material layer comprising a metal layer sandwiched between two highly reflective metal layers, wherein the metal layer defines at least one nanogroove and a dielectric material disposed within the at least one nanogroove and disposed adjacent to one of the two highly reflective metal layers, wherein the localized plasmonic nanoresonator assembly is configured to funnel and absorb a portion of an electromagnetic spectrum in the at least one nanogroove via localized plasmonic resonance to transmit a filtered output having a predetermined range of wavelengths that displays angle insensitivity so that the predetermined range of wavelengths varies less than or equal to about 20 nm from an incidence angle of 0° to an incidence angle of 90° with respect to the filtering device.