Patent ID: 8247754

Claim:
An apparatus comprising: a substrate; a first pixel comprising a first photodiode array disposed on the substrate, wherein the first photodiode array comprises; a first photodiode for providing a first electrical signal, the first photodiode comprising a first reflector and a second reflector that are separated by a first separation, wherein the first reflector and the second reflector collectively define a first optically resonant cavity that is selectively resonant for a first wavelength within a spectral range, and wherein the first wavelength is based on the first separation; and a second photodiode for providing a second electrical signal, the second photodiode comprising a third reflector and a fourth reflector that are separated by a second separation that is different from the first separation, wherein the third reflector and the fourth reflector collectively define a second optically resonant cavity that is selectively resonant for a second wavelength within the spectral range, and wherein the second wavelength is based on the second separation.