4.5 Article

Study on temperature effect on properties of ZnO/MgZnO based quantum cascade detector in mid-infrared region

期刊

APPLIED PHYSICS EXPRESS
卷 10, 期 1, 页码 -

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IOP PUBLISHING LTD
DOI: 10.7567/APEX.10.011101

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资金

  1. National Natural Science Foundation of China [61474090]
  2. Fundamental Research Funds for the Central Universities [JB160105]
  3. 111 Project of China [B08038]

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The effect of temperature on a ZnO/Mg0.3Zn0.7O 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/Mg0.3Zn0.7O 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. (C) 2017 The Japan Society of Applied Physics

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