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Simulation Research of Nonlinear Behavior Induced by the Charge-Carrier Effect in Resonant-Cavity-Enhanced Photodetectors

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7 Author(s)
Jianchuan Guo ; Chinese Acad. of Sci., Beijing ; Yuhua Zuo ; Yun Zhang ; Wuchang Ding
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In this paper, we have calculated and discussed in detail the nonlinear effect induced by three carrier effects: free-carrier absorption, bandgap filling, and bandgap shrinkage. The central wavelength of response of resonant-cavity-enhanced (RCE) photodetectors shifts according to the change of the refractive index, and the response of a given optical wavelength simultaneously changes. With an increasing As composition of In1-xGaxAsyP1-y and the spacer thickness, the nonlinear effect increases, but the -1-dB input saturation optical power and the -1-dB saturation photocurrent decrease. Bistable-state operation occurs when the input optical power is in the proper bistable region.

Published in:

Journal of Lightwave Technology  (Volume:25 ,  Issue: 9 )