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Long wavelength resonant cavity photodetector based on InP/air-gap Bragg reflectors

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5 Author(s)
Hui Huang ; Beijing Univ. of Posts & Telecommun., China ; Yongqing Huang ; Xingyan Wang ; Qi Wang
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We demonstrate a long wavelength resonant cavity photodetector with InP/air-gap Bragg reflectors, which is fabricated by using selective wet etching. The peak quantum efficiency is 59% at 1510 nm. A 3-dB bandwidth of 8 GHz has been achieved with the active area of 50×50 μm2. Compared with the detector of same absorption depth, a three-fold increase of absorption efficiency is obtained at resonant wavelength.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 1 )