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Design of a tunable GaAs/AlGaAs multiple-quantum-well resonant-cavity photodetector

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2 Author(s)
K. Lai ; Microelectron. Res. Center, Texas Univ., Austin, TX, USA ; J. C. Campbell

We describe a tunable p-i-n photodetector using GaAs/AlGaAs multiple quantum wells (MQW) embedded in a vertical resonant cavity. The structure is similar to that employed for Fabry-Perot MQW modulators and lasers. Turnability is achieved by utilizing the quantum-confined Stark effect. The calculated response predicts a tuning range up to 20 nm. As a dual-channel wavelength-division demultiplexer, the crosstalk ratio is calculated to be <-5 dB for one channel and <-15 dB for the other. The quantum efficiencies are projected to be in the range of 40% to 55%

Published in:

IEEE Journal of Quantum Electronics  (Volume:30 ,  Issue: 1 )