Abstract
The photoresponse is investigated in the frequency range of 0.15–15 THz in HgCdTe epitaxial layers with a cadmium concentration from 15.2 to 19.2% grown by molecular-beam epitaxy. It is shown that narrow-gap and gapless HgCdTe solid solutions can be used as detectors of both terahertz and sub-terahertz radiation with a characteristic response time of 2–4 ns and with a sensitivity approaching n-InSb-based detectors widely used in this range.
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Funding
The sensitivity measurements of structures based on HgCdTe in the sub-THz range, as well as measurements of the CR spectra for analyzing gyrotron radiation, were supported by the Russian Science Foundation, grant no. 18-79-10112. Investigations of the spectra and the kinetics of the photoresponse in the spectral range of 5–15 THz were supported by a grant from the President of the Russian Federation for the state support of young Russian scientists—candidates of sciences (MK-1430.2020.2).
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Translated by V. Bukhanov
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Rumyantsev, V.V., Maremyanin, K.V., Razova, A.A. et al. Investigation of the Photosensitivity of Narrow-Gap and Gapless HgCdTe Solid Solutions in the Terahertz and Sub-Terahertz Range. Semiconductors 54, 1096–1102 (2020). https://doi.org/10.1134/S1063782620090249
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DOI: https://doi.org/10.1134/S1063782620090249