Abstract-Two-color detector: Mercury-cadmium-telluride as a terahertz and infrared detector

F. Sizov¹, V. Zabudsky¹, S. Dvoretskii², V. Petryakov¹, A. Golenkov¹, K. Andreyeva¹ and Z. Tsybrii¹
 HIDE AFFILIATIONS
1 Institute of Semiconductor Physics, 03028 Kiev, Ukraine
2 Institute of Semiconductor Physics of SB RAS, 630090 Novosibirsk, Russia
http://scitation.aip.org/content/aip/journal/apl/106/8/10.1063/1.4913590
Appl. Phys. Lett. 106, 082104 (2015); http://dx.doi.org/10.1063/1.4913590

In this paper, issues associated with the development of infrared (IR) and terahertz (THz)radiation detectors based on HgCdTe are discussed. Two-color un-cooled and cooled to 78 K narrow-gap mercury-cadmium-telluride semiconductor thin layers with antennas were considered both as sub-THz (sub-THz) direct detection bolometers and 3–10 μm IRphotoconductors. The noise equivalent power (NEP) for one of the detectors studied at ν ≈ 140 GHz reaches NEP300 K ≈ 4.5 × 10⁻¹⁰ W/Hz^1/2 and NEP78 K ≈ 5 × 10⁻⁹ W/Hz^1/2. The samedetector used as an IR photoconductor showed the responsivity at temperatures T = 78 K and 300 K with signal-to-noise ratio S/N ≈ 750 and 50, respectively, under illumination by using IR monochromator and globar as a thermal source.