Charged excitonic complexes in GaAs/Al0.35Ga0.65As p-i-n double quantum wells

V. B. Timofeev; A. V. Larionov; M. Grassi Alessi; M. Capizzi; A Frova; Jørn Märcher Hvam

doi:10.1103/PhysRevB.60.8897

Charged excitonic complexes in GaAs/Al0.35Ga0.65As p-i-n double quantum wells

V. B. Timofeev, A. V. Larionov, M. Grassi Alessi, M. Capizzi, A Frova, Jørn Märcher Hvam

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Abstract

Photoluminescence (PL) and PL excitation measurements (PLE) have been performed in GaAs/AlxGa1-xAs double quantum well (QW) structures under different applied electric fields. An emission due to charged excitons (trions) has been identified in the PL spectra similar to 3 meV below the heavy-hole exciton emission. These trions are localized by random potential fluctuations, at the interfaces or in the QW, as shown by the saturation of their emission intensity with respect to that of the heavy-hole excitons. Trions are positively charged, namely, they are made by two holes and one electron, as shown by (i) an analysis of the PL polarization for resonant excitation of the heavy- and the light-exciton ground state, and (ii) the analysis of the Zeeman effect for the trion PL band in the Faraday geometry, i.e., for a magnetic field normal to the QW's.

Original language	English
Journal	Physical Review B
Volume	60
Issue number	12
Pages (from-to)	8897-8901
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.60.8897
Publication status	Published - 1999

Bibliographical note

Copyright (1999) by the American Physical Society.

Keywords

LOCALIZATION
RANDOM POTENTIAL FLUCTUATIONS
INTERWELL RADIATIVE RECOMBINATION
LUMINESCENCE

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@article{a404451ce69b42d7bf9698f5bfb6c86d,

title = "Charged excitonic complexes in GaAs/Al0.35Ga0.65As p-i-n double quantum wells",

abstract = "Photoluminescence (PL) and PL excitation measurements (PLE) have been performed in GaAs/AlxGa1-xAs double quantum well (QW) structures under different applied electric fields. An emission due to charged excitons (trions) has been identified in the PL spectra similar to 3 meV below the heavy-hole exciton emission. These trions are localized by random potential fluctuations, at the interfaces or in the QW, as shown by the saturation of their emission intensity with respect to that of the heavy-hole excitons. Trions are positively charged, namely, they are made by two holes and one electron, as shown by (i) an analysis of the PL polarization for resonant excitation of the heavy- and the light-exciton ground state, and (ii) the analysis of the Zeeman effect for the trion PL band in the Faraday geometry, i.e., for a magnetic field normal to the QW's.",

keywords = "LOCALIZATION, RANDOM POTENTIAL FLUCTUATIONS, INTERWELL RADIATIVE RECOMBINATION, LUMINESCENCE",

author = "Timofeev, {V. B.} and Larionov, {A. V.} and Alessi, {M. Grassi} and M. Capizzi and A Frova and Hvam, {J{\o}rn M{\"a}rcher}",

note = "Copyright (1999) by the American Physical Society.",

year = "1999",

doi = "10.1103/PhysRevB.60.8897",

language = "English",

volume = "60",

pages = "8897--8901",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "12",

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TY - JOUR

T1 - Charged excitonic complexes in GaAs/Al0.35Ga0.65As p-i-n double quantum wells

AU - Timofeev, V. B.

AU - Larionov, A. V.

AU - Alessi, M. Grassi

AU - Capizzi, M.

AU - Frova, A

AU - Hvam, Jørn Märcher

PY - 1999

Y1 - 1999

N2 - Photoluminescence (PL) and PL excitation measurements (PLE) have been performed in GaAs/AlxGa1-xAs double quantum well (QW) structures under different applied electric fields. An emission due to charged excitons (trions) has been identified in the PL spectra similar to 3 meV below the heavy-hole exciton emission. These trions are localized by random potential fluctuations, at the interfaces or in the QW, as shown by the saturation of their emission intensity with respect to that of the heavy-hole excitons. Trions are positively charged, namely, they are made by two holes and one electron, as shown by (i) an analysis of the PL polarization for resonant excitation of the heavy- and the light-exciton ground state, and (ii) the analysis of the Zeeman effect for the trion PL band in the Faraday geometry, i.e., for a magnetic field normal to the QW's.

AB - Photoluminescence (PL) and PL excitation measurements (PLE) have been performed in GaAs/AlxGa1-xAs double quantum well (QW) structures under different applied electric fields. An emission due to charged excitons (trions) has been identified in the PL spectra similar to 3 meV below the heavy-hole exciton emission. These trions are localized by random potential fluctuations, at the interfaces or in the QW, as shown by the saturation of their emission intensity with respect to that of the heavy-hole excitons. Trions are positively charged, namely, they are made by two holes and one electron, as shown by (i) an analysis of the PL polarization for resonant excitation of the heavy- and the light-exciton ground state, and (ii) the analysis of the Zeeman effect for the trion PL band in the Faraday geometry, i.e., for a magnetic field normal to the QW's.

KW - LOCALIZATION

KW - RANDOM POTENTIAL FLUCTUATIONS

KW - INTERWELL RADIATIVE RECOMBINATION

KW - LUMINESCENCE

U2 - 10.1103/PhysRevB.60.8897

DO - 10.1103/PhysRevB.60.8897

M3 - Journal article

SN - 2469-9950

VL - 60

SP - 8897

EP - 8901

JO - Physical Review B

JF - Physical Review B

IS - 12

ER -

Charged excitonic complexes in GaAs/Al0.35Ga0.65As p-i-n double quantum wells

Abstract

Bibliographical note

Keywords

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