Patent ID: 9128230
Filing Date: 2015-09-08
Classification: G01J,G02B

Abstract:
1. An optical absorber for long-wave infrared radiation, comprising: an absorbing dielectric substrate having opposed upper and lower surfaces; and a plurality of plasmonic cells formed on the upper surface of said absorbing dielectric substrate, wherein said plurality of plasmonic cells are arrayed in a regular rectangular grid pattern, each said plasmonic cell comprising a plurality of elongated strips each extending along an identical axis of orientation within said plasmonic cell, wherein adjacent ones of said plasmonic cells are oriented orthogonally with respect to one another, each said elongated strip comprising a titanium layer formed on the upper surface of said absorbing dielectric substrate and a gold layer formed on the titanium layer, such that the titanium layer is sandwiched between the gold layer and the upper surface of said absorbing dielectric substrate.