Photoconductivity Amplification in a Type-II n-GaSb/InAs/p-GaSb Heterostructure with a Single QW
- Authors: Mikhailova M.P.1, Andreev I.A.1, Konovalov G.G.1, Danilov L.V.1, Ivanov E.V.1, Kunitsyna E.V.1, Il’inskaya N.D.1, Levin R.V.1, Pushnyi B.V.1, Yakovlev Y.P.1
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Affiliations:
- Ioffe Institute
- Issue: Vol 52, No 8 (2018)
- Pages: 1037-1042
- Section: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/203865
- DOI: https://doi.org/10.1134/S1063782618080146
- ID: 203865
Cite item
Abstract
Significant photocurrent/photoconductivity amplification is observed at low reverse biases in a type-II n-GaSb/InAs/p-GaSb heterostructure with a single quantum well (QW), grown by metal-organic vapor phase epitaxy. A sharp increase in the photocurrent by more than two orders of magnitude occurs under exposure of the heterostructure to monochromatic light with a wavelength of 1.2–1.6 μm (at 77 K) and the application of a reverse bias in the range 5–200 mV. The optical gain depends on the applied voltage and increases to 2.5 × 102 at a reverse bias of 800 mV. Theoretical analysis demonstrated that the main role in the phenomenon is played by the screening of the external electric field by electrons accumulated in the deep InAs QW and by the mechanism of the tunneling transport of carriers with a small effective mass. It is shown that the effect under study is common to both isotype and anisotype type-II heterojunctions, including structures with QWs and superlattices.
About the authors
M. P. Mikhailova
Ioffe Institute
Author for correspondence.
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
I. A. Andreev
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
G. G. Konovalov
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
L. V. Danilov
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
E. V. Ivanov
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
E. V. Kunitsyna
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
N. D. Il’inskaya
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
R. V. Levin
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
B. V. Pushnyi
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021
Yu. P. Yakovlev
Ioffe Institute
Email: Mikh@iropt1.ioffe.ru
Russian Federation, St. Petersburg, 194021