A. A. Kharchenko, A. M. Nadtochiy, A. A. Serin, S. A. Mintairov, N. A. Kalyuzhnyy, A. E. Zhukov, M. V. Maksimov, S. Breuer, “Bimodality in the electroluminescence spectra of quantum well-dots InGaAs nanostructures”, Fizika i Tekhnika Poluprovodnikov, 2022, Volume 56, Issue 1,Pages <nobr>97

Semiconductor structures, low-dimensional systems, quantum phenomena

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

A. A. Kharchenko^a, A. M. Nadtochiy^ab, A. A. Serin^c, S. A. Mintairov^c, N. A. Kalyuzhnyy^c, A. E. Zhukov^b, M. V. Maksimov^a, S. Breuer^d

^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