Resonant-cavity-enhanced <i>pin</i> photodetector with 17 GHzbandwidth-efficiency product

Abstract

The addition of a resonant optical cavity to a photodetector enhances the quantum efficiency of the detector over a narrow wavelength range. The authors have designed, fabricated, and demonstrated resonant-cavity-enhanced GaAs pin photodetectors with near-unity quantum efficiency at 812 nm and transit-limited bandwidths of ~17 GHz.