Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots

B Patton, W Langbein, U Woggon

Research output: Contribution to journalArticle

166 Citations (Scopus)

Abstract

We present an analysis of time- and polarization-resolved data taken in microphotoluminescence experiments on individual CdSe/ZnSe quantum dots grown by molecular beam epitaxy. The identification of individual dots was performed by a spectral jitter correlation technique and by their polarization properties and density dependences. Decay times are given for exciton, trion, and biexciton states and evidence is shown for a spin-relaxation-limited energy relaxation of the trion. For the bright-exciton state the temperature dependence of the decay time is studied and a repopulation from the dark-exciton state is observed. Trion binding energies of 15–22 meV and biexciton binding energies of 19–26 meV are found.
LanguageEnglish
Article number125316
Number of pages9
JournalPhysical Review B
Volume68
Issue number12
DOIs
Publication statusPublished - 18 Sep 2003

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Excitons
Semiconductor quantum dots
quantum dots
excitons
Binding energy
binding energy
Polarization
decay
polarization
Jitter
Molecular beam epitaxy
molecular beam epitaxy
vibration
temperature dependence
LDS 751
Experiments
Temperature
energy

Keywords

  • polarization-resolved data
  • microphotoluminescence
  • quantum dots
  • molecular beam epitaxy
  • spectral jitter correlation technique
  • polarization properties
  • density dependences
  • dark-exciton state
  • trion binding
  • biexciton binding

Cite this

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title = "Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots",
abstract = "We present an analysis of time- and polarization-resolved data taken in microphotoluminescence experiments on individual CdSe/ZnSe quantum dots grown by molecular beam epitaxy. The identification of individual dots was performed by a spectral jitter correlation technique and by their polarization properties and density dependences. Decay times are given for exciton, trion, and biexciton states and evidence is shown for a spin-relaxation-limited energy relaxation of the trion. For the bright-exciton state the temperature dependence of the decay time is studied and a repopulation from the dark-exciton state is observed. Trion binding energies of 15–22 meV and biexciton binding energies of 19–26 meV are found.",
keywords = "polarization-resolved data, microphotoluminescence, quantum dots, molecular beam epitaxy, spectral jitter correlation technique, polarization properties, density dependences, dark-exciton state, trion binding, biexciton binding",
author = "B Patton and W Langbein and U Woggon",
year = "2003",
month = "9",
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doi = "10.1103/PhysRevB.68.125316",
language = "English",
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journal = "Physical Review B: Condensed Matter and Materials Physics",
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Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots. / Patton, B; Langbein, W; Woggon, U.

In: Physical Review B, Vol. 68, No. 12, 125316, 18.09.2003.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots

AU - Patton, B

AU - Langbein, W

AU - Woggon, U

PY - 2003/9/18

Y1 - 2003/9/18

N2 - We present an analysis of time- and polarization-resolved data taken in microphotoluminescence experiments on individual CdSe/ZnSe quantum dots grown by molecular beam epitaxy. The identification of individual dots was performed by a spectral jitter correlation technique and by their polarization properties and density dependences. Decay times are given for exciton, trion, and biexciton states and evidence is shown for a spin-relaxation-limited energy relaxation of the trion. For the bright-exciton state the temperature dependence of the decay time is studied and a repopulation from the dark-exciton state is observed. Trion binding energies of 15–22 meV and biexciton binding energies of 19–26 meV are found.

AB - We present an analysis of time- and polarization-resolved data taken in microphotoluminescence experiments on individual CdSe/ZnSe quantum dots grown by molecular beam epitaxy. The identification of individual dots was performed by a spectral jitter correlation technique and by their polarization properties and density dependences. Decay times are given for exciton, trion, and biexciton states and evidence is shown for a spin-relaxation-limited energy relaxation of the trion. For the bright-exciton state the temperature dependence of the decay time is studied and a repopulation from the dark-exciton state is observed. Trion binding energies of 15–22 meV and biexciton binding energies of 19–26 meV are found.

KW - polarization-resolved data

KW - microphotoluminescence

KW - quantum dots

KW - molecular beam epitaxy

KW - spectral jitter correlation technique

KW - polarization properties

KW - density dependences

KW - dark-exciton state

KW - trion binding

KW - biexciton binding

U2 - 10.1103/PhysRevB.68.125316

DO - 10.1103/PhysRevB.68.125316

M3 - Article

VL - 68

JO - Physical Review B: Condensed Matter and Materials Physics

T2 - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

SN - 1098-0121

IS - 12

M1 - 125316

ER -