Abstract:
Photoluminescence spectra of an isolated GaAs quantum dot within an AlGaAs quantum wire are studied. The examination of behavior of spectra in a magnetic field provided an opportunity to estimate the exciton binding energy in the quantum dot, which turned out to be 10 times higher than the bulk exciton binding energy in GaAs. It is demonstrated that the signal of exciton photoluminescence from the quantum dot emitted along the nanowire axis is linearly polarized. At the same time, the photoluminescence signal propagating in the direction perpendicular to the nanowire axis is almost unpolarized. This may be attributed to the nonaxial dot positioning in the wire under a giant increase in the binding energy of an exciton affected by an image potential.
Citation:
V. N. Kats, A. V. Platonov, G. E. Cirlin, A. D. Bouravlev, A. Delga, L. Besombes, H. Mariette, V. P. Kochereshko, “Polarization spectroscopy of an isolated quantum dot and an isolated quantum wire”, Fizika Tverdogo Tela, 60:12 (2018), 2445–2449; Phys. Solid State, 60:12 (2018), 2623–2627
\Bibitem{KatPlaCir18}
\by V.~N.~Kats, A.~V.~Platonov, G.~E.~Cirlin, A.~D.~Bouravlev, A.~Delga, L.~Besombes, H.~Mariette, V.~P.~Kochereshko
\paper Polarization spectroscopy of an isolated quantum dot and an isolated quantum wire
\jour Fizika Tverdogo Tela
\yr 2018
\vol 60
\issue 12
\pages 2445--2449
\mathnet{http://mi.mathnet.ru/ftt8986}
\crossref{https://doi.org/10.21883/FTT.2018.12.46737.136}
\elib{https://elibrary.ru/item.asp?id=36929239}
\transl
\jour Phys. Solid State
\yr 2018
\vol 60
\issue 12
\pages 2623--2627
\crossref{https://doi.org/10.1134/S1063783418120156}
Linking options:
https://www.mathnet.ru/eng/ftt8986
https://www.mathnet.ru/eng/ftt/v60/i12/p2445
This publication is cited in the following 1 articles:
Katerina Michailovska, Viktor Dan'ko, Ivan Indutnyi, Petro Shepeliavyi, Mykola Sopinskyy, “Polarized luminescence of silicon nanoparticles formed in (SiOx–SiOy)n superlattice”, Appl Nanosci, 12:3 (2022), 479