Bimodality in the Electroluminescence Spectra of InGaAs Quantum Well–Dot Nanostructures

The polarization-resolved electroluminescence spectra of waveguide structures based on quantum well–dots are investigated 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. The spectral separation of these...

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Published inSemiconductors (Woodbury, N.Y.) Vol. 56; no. 6; pp. 329 - 332
Main Authors Kharchenko, A. A., Nadtochiy, A. M., Serin, A. A., Mintairov, S. A., Kalyuzhnyy, N. A., Zhukov, A. E., Maximov, M. V., Breuer, S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.06.2022
Springer
Springer Nature B.V
Subjects
Electroluminescence
Emission
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Polarization
Polarized light
Quantum dots
Quantum wells
Spectra
Waveguides
quantum dots
waveguide structures
InGaAs heterostructures
electroluminescence
polarization of emission
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Summary:The polarization-resolved electroluminescence spectra of waveguide structures based on quantum well–dots are investigated 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. The spectral separation of these peaks decreases with a decrease in temperature. The observed bimodality is attributed to the existence of two different types of objects in the active region, namely, quantum well–dots, whose emission is only partially TE polarized, and quantum dots, which emit nearly fully TE polarized light.
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378262207003X