High Quantum Efficiency Dual Wavelength Resonant-Cavity Photodetector

摘要

A new dual wavelength, resonant cavity photodiode is described. It has previouslybeen shown that the resonant cavity structure can achieve high quantum efficiencies in a relatively narrow spectral region with thin absorbing regions. In this letter, a dual wavelength mirror is incorporated into the cavity to achieve operation in two wavelength regions. Peak external quantum efficiencies greater than 50% were demonstrated at 730 and 910 nm.