Patent ID: 7566942

Claim:
A multi-spectral focal plane array comprising: a plurality of multi-spectral detection pixels, and; a connecting platform to electrically connect the said pixels, wherein each said multi-spectral detection pixel comprises: at least two periodic latticed dielectric reflector structures having alternating layers of high-index dielectric material comprising As 2 Se 3 and low-index material comprising As 2 S 3 , and; at least one optical cavity between said latticed dielectric reflector structures, and; a plurality of photonic bandgaps in the spectral response of said pixel, wherein each said optical cavity comprises: at least two optical resonant modes per said optical cavity, each optical resonant mode being a quantized and localized electromagnetic Bloch mode, and; at least two metal-semiconductor-insulator inclusions inside said optical cavity; said at least two metal-semiconductor-insulator inclusions comprising a photoconductive As—Se—Te—Cu layer wherein each said inclusion is located at one of the electromagnetic field amplitude maxima of one of the said optical resonant mode, and wherein each said inclusion performs optical-to-electrical signal conversion, wherein each said inclusion has a frequency-specific photodetection based on modal discrimination of localized eigenstates by mapping the magnitude distribution of a first eigenstate as a function of position inside the optical cavity to produce a first map, and comparing the first map with a second map showing the combined magnitudes of all other eigenstates in determining the optimal position of one of at least two metal-semiconductor-insulator inclusions inside the cavity, and wherein the electrical signal carried by said inclusion is brought to said connecting platform.