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
Affiliations
Mikhail K. Sotnichuk
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Aleksei S. Kazakov
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Ilya D. Nikolaev
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Konstantin A. Drozdov
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Roman V. Menshchikov
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Sergey A. Dvoretsky
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Nikolay N. Mikhailov
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Dmitry R. Khokhlov
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Anton V. Ikonnikov
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
DOI
https://doi.org/10.3390/photonics10080877
Journal volume & issue
Vol. 10,
no. 8
Abstract
Read online
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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