Negative photoconductivity in HgCdTe layers under illumination with millimeter waves

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Physics A Pub Date : 2025-03-31 DOI:10.1007/s00339-025-08463-5

Nataliia Kukhtaruk, Fedir Sizov, Viacheslav Zabudsky, Zinoviia Tsybrii, Ihor Lysiuk

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引用次数: 0

Abstract

In this paper we report the negative photoconductivity in Hg_1 − x Cd_xTe (Mercury-Cadmium-Telluride – MCT) under millimeter light illumination observed experimentally in MCT thin layers. We investigated photoconductivity in thin layers of narrow-gap Hg_1 − x Cd_xTe of different composition (from x = 0.2 to x = 0.305) and conductivity type (both n- and p-type) that were grown epitaxially or obtained by mechanical and chemical thinning of MCT single crystals and integrated with metal antennas. The temperature dependences of the photoresponse were obtained theoretically and experimentally in the temperature range of 77..300 K in which both positive and negative photoconductivity were observed. The reasons that may cause the negative photoconductivity at different conditions are considered within the framework of the hot electron bolometer model. It was found that not only parameters of the semiconductor, dimensions of the sample and its temperature, but also the dimensions of an antenna and the properties of its contact with the semiconductor impact the photoconductivity.

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.