This paper presents the design, fabrication and optoelectronic characterization of an InAs resonant-cavity-enhanced photodetector, intended for the detection of methane gas, incorporating a 10 period GaAs/AlAs distributed-Bragg reflector. The spectrally narrowed responsivity was resonantly enhanced to a value of 34.7 A W −1 , at an applied voltage of 3.0 V. This high resonantly enhanced peak in the responsivity was at λ = 3.14 µm, which is only 5% away from the target value.
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Green et al. (2003) studied this question.
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