High bandwidth-efficiency resonant cavity enhanced Schottky photodiodes for 800-850 nm wavelength operation
Applied Physics Letters
A I P Publishing LLC
2727 - 2729
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High-speed resonant cavity enhanced Schottky photodiodes operating in 800-850 nm wavelength region are demonstrated. The devices are fabricated in the AlGaAs/GaAs material system. The Schottky contact is a semitransparent Au film which also serves as the top reflector of the Fabry-Perot cavity. The detectors exhibit a peak quantum efficiency of η=0.5 at λ=827nm wavelength and a 3 dB bandwidth of more than 50 GHz resulting in a bandwidth-efficiency product of more than 25 GHz.