In–HgCdTe–In structures with symmetric nonlinear I–V characteristics for sub-THz direct detection

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2017
• Main Authors: Kukhtaruk, N.I., Zabudsky, V.V., Shevchik-Shekera, A.V., Mikhailov, N.N., Sizov, F.F.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2017
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/214937
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: In–HgCdTe–In structures with symmetric nonlinear I–V characteristics for sub-THz direct detection / N.I. Kukhtaruk, V.V. Zabudsky, A.V. Shevchik-Shekera, N.N. Mikhailov, F.F. Sizov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2017. — Т. 20, № 2. — С. 173-178. — Бібліогр.: 13 назв. — англ.

This paper reports on the development and investigations of In–Hg₁₋ₓCdxTe–In structures with symmetric nonlinear I–V curves that are sensitive to sub-terahertz radiation. It is shown that at low currents photoresponse of the detectors based on these structures is due to the presence of potential barriers at the contacts. The dependences of the photoresponse as a function of the bias current are measured at the radiation frequency ν = 140 GHz in the 77–300 K temperature range. The studied structures may be used as detectors of sub-terahertz radiation at room temperature or under weak cooling. The calculated NEP of investigated In–n-Hg₀.₆₁Cd₀.₃₉Te–In detectors was 3.5·10⁻⁹ W/Hz¹/², if taking into account thermal and shot noise.