We present an unusual photoconductive response in doped GaAs and InP semiconductor epitaxial layers and demonstrate that such a response is due to the longitudinal optic (LO) phonon-induced Fano resonance instead of the traditional kinetic mechanism. Theoretical calculations based upon the present mechanism are in excellent agreement with the experimental results and the developed formalism should be universally applicable to the related photoconductive processes of other doped semiconductors.
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Jin et al. (2001) studied this question.
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