Visualization of space charge field effect on excitons in a GaAs quantum dot by near-field optical wavefunction mapping

Yoshiaki Sugimoto; Nobuhiro Tsumori; Shintaro Nomura; Toshiharu Saiki

doi:10.1007/s10043-009-0050-3

Visualization of space charge field effect on excitons in a GaAs quantum dot by near-field optical wavefunction mapping

Yoshiaki Sugimoto, Nobuhiro Tsumori, Shintaro Nomura, Toshiharu Saiki

Department of Electronics and Electrical Engineering

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

9 Citations (Scopus)

Abstract

Near-field photoluminescence (PL) imaging spectroscopy was used to investigate multi-exciton and charged-exciton states confined in a single GaAs interface fluctuation quantum dot. We determined the origin of peaks in the PL spectra by employing a wavefunction mapping technique. We observed distortion of the exciton wavefunction due to the electric field produced by an excess electron at a nearby confined state. Near-field wavefunction mapping was demonstrated to be a powerful tool for visualizing the local environment, which affects the emission properties of quantum dots.

Original language	English
Pages (from-to)	269-273
Number of pages	5
Journal	Optical Review
Volume	16
Issue number	3
DOIs	https://doi.org/10.1007/s10043-009-0050-3
Publication status	Published - 2009 May

Keywords

Charged exciton
Finite-difference time-domain calculation method
Interfacial fluctuation quantum dot
Multi exciton
Near-field scanning microscope
Photoluminescence imaging spectroscopy

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1007/s10043-009-0050-3

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title = "Visualization of space charge field effect on excitons in a GaAs quantum dot by near-field optical wavefunction mapping",

abstract = "Near-field photoluminescence (PL) imaging spectroscopy was used to investigate multi-exciton and charged-exciton states confined in a single GaAs interface fluctuation quantum dot. We determined the origin of peaks in the PL spectra by employing a wavefunction mapping technique. We observed distortion of the exciton wavefunction due to the electric field produced by an excess electron at a nearby confined state. Near-field wavefunction mapping was demonstrated to be a powerful tool for visualizing the local environment, which affects the emission properties of quantum dots.",

keywords = "Charged exciton, Finite-difference time-domain calculation method, Interfacial fluctuation quantum dot, Multi exciton, Near-field scanning microscope, Photoluminescence imaging spectroscopy",

author = "Yoshiaki Sugimoto and Nobuhiro Tsumori and Shintaro Nomura and Toshiharu Saiki",

year = "2009",

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T1 - Visualization of space charge field effect on excitons in a GaAs quantum dot by near-field optical wavefunction mapping

AU - Sugimoto, Yoshiaki

AU - Tsumori, Nobuhiro

AU - Nomura, Shintaro

AU - Saiki, Toshiharu

PY - 2009/5

Y1 - 2009/5

N2 - Near-field photoluminescence (PL) imaging spectroscopy was used to investigate multi-exciton and charged-exciton states confined in a single GaAs interface fluctuation quantum dot. We determined the origin of peaks in the PL spectra by employing a wavefunction mapping technique. We observed distortion of the exciton wavefunction due to the electric field produced by an excess electron at a nearby confined state. Near-field wavefunction mapping was demonstrated to be a powerful tool for visualizing the local environment, which affects the emission properties of quantum dots.

AB - Near-field photoluminescence (PL) imaging spectroscopy was used to investigate multi-exciton and charged-exciton states confined in a single GaAs interface fluctuation quantum dot. We determined the origin of peaks in the PL spectra by employing a wavefunction mapping technique. We observed distortion of the exciton wavefunction due to the electric field produced by an excess electron at a nearby confined state. Near-field wavefunction mapping was demonstrated to be a powerful tool for visualizing the local environment, which affects the emission properties of quantum dots.

KW - Charged exciton

KW - Finite-difference time-domain calculation method

KW - Interfacial fluctuation quantum dot

KW - Multi exciton

KW - Near-field scanning microscope

KW - Photoluminescence imaging spectroscopy

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AN - SCOPUS:67149086724

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VL - 16

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EP - 273

JO - Optical Review

JF - Optical Review

IS - 3

ER -

Visualization of space charge field effect on excitons in a GaAs quantum dot by near-field optical wavefunction mapping

Abstract

Keywords

ASJC Scopus subject areas

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