Optically detected single-electron charging in a quantum dot

A. Zrenner; F. Findeis; M. Baier; M. Bichler; G. Abstreiter; U. Hohenester; E. Molinari

doi:10.1016/S1386-9477(01)00495-7

Optically detected single-electron charging in a quantum dot

A. Zrenner, F. Findeis, M. Baier, M. Bichler, G. Abstreiter, U. Hohenester, E. Molinari

Natural Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

By means of photoluminescence spectroscopy we compare the bias-dependent emissions of single-quantum dots which are embedded in two differently designed photodiode structures. Controlled single-electron charging allows to identify neutral, single- and double-charged excitons in the optical spectra of both samples. At high magnetic fields, one Zeeman component of the single-charged exciton is found to be quenched, which is attributed to the competing effects of tunnelling and spin-flip processes. The strength of the tunnelling coupling between quantum dot and back-contact was found to have a strong influence on the observed spectral features - in particular, the parallel appearance of emission lines resulting from the radiative decay of differently charged quantum dot states is suppressed in case of strong tunnelling interaction.

Original language	English
Pages (from-to)	95-100
Number of pages	6
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	13
Issue number	2-4
DOIs	https://doi.org/10.1016/S1386-9477(01)00495-7
State	Published - Mar 2002

Keywords

Charged excitons
Magneto-optics
Quantum dots

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10.1016/S1386-9477(01)00495-7

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abstract = "By means of photoluminescence spectroscopy we compare the bias-dependent emissions of single-quantum dots which are embedded in two differently designed photodiode structures. Controlled single-electron charging allows to identify neutral, single- and double-charged excitons in the optical spectra of both samples. At high magnetic fields, one Zeeman component of the single-charged exciton is found to be quenched, which is attributed to the competing effects of tunnelling and spin-flip processes. The strength of the tunnelling coupling between quantum dot and back-contact was found to have a strong influence on the observed spectral features - in particular, the parallel appearance of emission lines resulting from the radiative decay of differently charged quantum dot states is suppressed in case of strong tunnelling interaction.",

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T1 - Optically detected single-electron charging in a quantum dot

AU - Zrenner, A.

AU - Findeis, F.

AU - Baier, M.

AU - Bichler, M.

AU - Abstreiter, G.

AU - Hohenester, U.

AU - Molinari, E.

PY - 2002/3

Y1 - 2002/3

N2 - By means of photoluminescence spectroscopy we compare the bias-dependent emissions of single-quantum dots which are embedded in two differently designed photodiode structures. Controlled single-electron charging allows to identify neutral, single- and double-charged excitons in the optical spectra of both samples. At high magnetic fields, one Zeeman component of the single-charged exciton is found to be quenched, which is attributed to the competing effects of tunnelling and spin-flip processes. The strength of the tunnelling coupling between quantum dot and back-contact was found to have a strong influence on the observed spectral features - in particular, the parallel appearance of emission lines resulting from the radiative decay of differently charged quantum dot states is suppressed in case of strong tunnelling interaction.

AB - By means of photoluminescence spectroscopy we compare the bias-dependent emissions of single-quantum dots which are embedded in two differently designed photodiode structures. Controlled single-electron charging allows to identify neutral, single- and double-charged excitons in the optical spectra of both samples. At high magnetic fields, one Zeeman component of the single-charged exciton is found to be quenched, which is attributed to the competing effects of tunnelling and spin-flip processes. The strength of the tunnelling coupling between quantum dot and back-contact was found to have a strong influence on the observed spectral features - in particular, the parallel appearance of emission lines resulting from the radiative decay of differently charged quantum dot states is suppressed in case of strong tunnelling interaction.

KW - Charged excitons

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KW - Quantum dots

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Optically detected single-electron charging in a quantum dot

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