Abstract
The ultimate performance of uncooled CdHgTe photon detectors for 10.6 μm radiation has been analysed. PC and PEM detectors based on CdHgTe homogeneous epitaxial layers or graded-gap structures are considered. The performance has been calculated numerically using a generalized model of PC and PEM effects in heterogeneous structures. Relatively high ultimate voltage responsivity and normalized detectivity for the detectors mentioned have been predicted. It has been shown that these detectors are better than other types of uncooled detectors as far as high-frequency modulation and the 10.6 μm wavelength range are concerned.
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