Back surface illuminated infrared detector

A back surface illuminated infrared detector, comprising:

• a substrate, said substrate having a top and a bottom face, said substrate having an index of refraction whereby said substrate is transparent to received photons of infrared energy having a predetermined range of wavelengths;
• a detector region, said detector region comprising a multiplicity of parallel, end connected, semiconductor filaments, said semiconductor filaments having predetermined length, width, and depth, further said semiconductor filaments having a predetermined pitch between each of said semiconductor filaments, said detector region resting upon said top face of said substrate, said detector region being operable to absorb said photons of infrared energy which pass through said substrate;
• a reflective means, said reflective means mounted above the top face of said substrate over said detector region defining an open gap between said reflective means and said detector region, said reflective means operable to reflect said photons of infrared energy which are not absorbed by said detector region and which pass between said semiconductor filaments of said detector region;
• a resonant cavity, said resonant cavity formed between said detector region and said reflective means mounted upon said substrate above said detector region, said resonant cavity being operable to produce a standing wave of said reflected photons of infrared energy;
• and
• at least one electrical contact means, said electrical contact means connected to said detector region.