Study on temperature effect on properties of ZnO/MgZnO based quantum cascade detector in mid-infrared region. (9th December 2016)

• Record Type: Journal Article
• Authors: He, Jingfang; Wang, Ping; Chen, Hongyan; Guo, Xinlu; Guo, Lixin; Yang, Yintang
• Is Part Of: Applied physics express. Volume 10:Number 1(2017)
• Publication Date: 2016-12-09
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.10.011101
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: The effect of temperature on a ZnO/Mg0.3 Zn0.7 O quantum cascade detector (QCD) in the mid-infrared region is investigated with consideration of bound-to-bound electronic-transport processes in the dark and under illumination. The temperature-dependent band structures of the QCD system, which comprises four quantum wells and five barriers in one period, are numerically calculated. The electronic transition is obtained with a standard electron-optical phonon Hamiltonian, and the photon absorption is described by the two-dimensional absorption coefficient. The responsivity of the ZnO/Mg0.3 Zn0.7 O QCD shows a good temperature stability without an obvious redshift, and the peak responsivity decreases by only 14% when the temperature increases from 50 to 300 K.