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Fizika i Tekhnika Poluprovodnikov, 2022 Volume 56, Issue 1, Pages 97–100 (Mi phts6977)

Semiconductor structures, low-dimensional systems, quantum phenomena

Bimodality in the electroluminescence spectra of quantum well-dots InGaAs nanostructures

A. A. Kharchenkoa, A. M. Nadtochiyab, A. A. Serinc, S. A. Mintairovc, N. A. Kalyuzhnyyc, A. E. Zhukovb, M. V. Maksimova, S. Breuerd

a Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg
b National Research University "Higher School of Economics", St. Petersburg Branch
c Ioffe Institute, St. Petersburg
d Institute of Applied Physics, Technische Universität Darmstadt, 64289 Darmstadt, Germany

Abstract: The electroluminescence spectra of waveguiding struc- tures based on quantum well-dots were investigated with polarization resolution in the temperature range of 60–300 K. It is found that the ground state emission consists of two peaks with different degrees of TE-polarization and these peaks are getting closer with temperature decrease. We attribute the bimodality to the existence of two different types of nanoobjects in the active region: the quantum well-dots, which have partially TE-polarized emission, and quantum dots emitting almost fully TE-polarized light.

Keywords: electroluminescence, quantum dots, ingaas heterostructures, waveguide structures, emission polarization.

Received: 13.08.2021
Revised: 27.08.2021
Accepted: 27.08.2021

DOI: 10.21883/FTP.2022.01.51818.9730



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