Photonics (Jul 2023)

Cap Layer Effect on Key Features of Persistent Photoconductivity Spectra in HgTe/CdHgTe Double Quantum Well Heterostructures

  • Mikhail K. Sotnichuk,
  • Aleksei S. Kazakov,
  • Ilya D. Nikolaev,
  • Konstantin A. Drozdov,
  • Roman V. Menshchikov,
  • Sergey A. Dvoretsky,
  • Nikolay N. Mikhailov,
  • Dmitry R. Khokhlov,
  • Anton V. Ikonnikov

DOI
https://doi.org/10.3390/photonics10080877
Journal volume & issue
Vol. 10, no. 8
p. 877

Abstract

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Persistent photoconductivity (PPC) spectra of HgTe/CdHgTe heterostructures with double quantum wells with different cap layers have been studied in the radiation excitation range 0.62–3.1 eV. We have shown that the material of the cap layer defines key features of the PPC spectra—local extrema—and their origin. An unusual oscillatory behavior of the PPC spectra is demonstrated. Such a behavior is shown to be independent of both cap and barrier layers.

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