Patent ID: 7276699
Filing Date: 2007-10-02
Classification: G01J,H01L

Abstract:
1. An infrared radiation detector, comprising: an active layer having a front side and a back side and being formed of a Mercury-Cadmium-Telluride material system; an anti-reflective coating disposed on the front side and formed of a Mercury-Cadmium-Telluride material system and being configured to minimize reflection of incident light within a wavelength band of interest upon the front side, the anti-reflective coating being comprised of a quarterwave stack of three layers each having an optical thickness equivalent to one-fourth of the wavelength band of interest; and a highly-reflective coating disposed on the back side and formed of a Mercury-Cadmium-Telluride material system and being configured to increase reflection within the wavelength band of interest upon the back side, the highly-reflective coating being comprised of a quarterwave stack of a plurality of layers each having an optical thickness equivalent to one-fourth of the wavelength band of interest.