RESONANT OPTICAL-DETECTION

Monochromatic optical detection is often desired. One technique to acc omplish this is to place the detector within an optical resonator, The authors consider the theoretical description of resonant optical dete ction using an intrinsic semiconductor detector layer placed within a monolithic vertical cavity. The effects of wavelength-dependent index and absorption are included in the analysis. It is found that, unlike passive Fabry-Perot filters, the resonant detector can have a single r esonant peak and thus strong suppression of out-of-band light.