Dimensional oscillation in GaAsAlAs quantum wells by two-dimensional standing surface acoustic waves

Tetsuomi Sogawa; Hideki Gotoh; Yoshiro Hirayama; Paulo V. Santos; Klaus H. Ploog

doi:10.1063/1.2790804

Dimensional oscillation in GaAsAlAs quantum wells by two-dimensional standing surface acoustic waves

Tetsuomi Sogawa, Hideki Gotoh, Yoshiro Hirayama, Paulo V. Santos, Klaus H. Ploog

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

9 Citations (Scopus)

Abstract

We have used spatially and time-resolved photoluminescence (PL) spectroscopy recorded using a synchronized excitation method in order to investigate the mechanisms for the dynamic PL modulation of GaAsAlAs quantum wells by two-dimensional (2D) standing surface acoustic waves (SAWs). It is clearly demonstrated that a square array of dynamic quantum dots (DQDs) is formed, which oscillates with a repetition interval equal to half of the SAW period. A 2D flatband condition appears between the DQD formations. The spatial modulation of the PL intensity is attributed to exciton migration into the tensile-strained dots created by the strain-induced band-gap modulation.

Original language	English
Article number	141917
Journal	Applied Physics Letters
Volume	91
Issue number	14
DOIs	https://doi.org/10.1063/1.2790804
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Cite this

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title = "Dimensional oscillation in GaAsAlAs quantum wells by two-dimensional standing surface acoustic waves",

abstract = "We have used spatially and time-resolved photoluminescence (PL) spectroscopy recorded using a synchronized excitation method in order to investigate the mechanisms for the dynamic PL modulation of GaAsAlAs quantum wells by two-dimensional (2D) standing surface acoustic waves (SAWs). It is clearly demonstrated that a square array of dynamic quantum dots (DQDs) is formed, which oscillates with a repetition interval equal to half of the SAW period. A 2D flatband condition appears between the DQD formations. The spatial modulation of the PL intensity is attributed to exciton migration into the tensile-strained dots created by the strain-induced band-gap modulation.",

author = "Tetsuomi Sogawa and Hideki Gotoh and Yoshiro Hirayama and Santos, {Paulo V.} and Ploog, {Klaus H.}",

note = "Funding Information: We gratefully acknowledge H. Kamada, T. Tawara, and H. Sanada for fruitful discussion and comments and T. Saku for the growth of high quality samples. This work was partly supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (19310067). ",

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AU - Sogawa, Tetsuomi

AU - Gotoh, Hideki

AU - Hirayama, Yoshiro

AU - Santos, Paulo V.

AU - Ploog, Klaus H.

N1 - Funding Information: We gratefully acknowledge H. Kamada, T. Tawara, and H. Sanada for fruitful discussion and comments and T. Saku for the growth of high quality samples. This work was partly supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (19310067).

PY - 2007

Y1 - 2007

N2 - We have used spatially and time-resolved photoluminescence (PL) spectroscopy recorded using a synchronized excitation method in order to investigate the mechanisms for the dynamic PL modulation of GaAsAlAs quantum wells by two-dimensional (2D) standing surface acoustic waves (SAWs). It is clearly demonstrated that a square array of dynamic quantum dots (DQDs) is formed, which oscillates with a repetition interval equal to half of the SAW period. A 2D flatband condition appears between the DQD formations. The spatial modulation of the PL intensity is attributed to exciton migration into the tensile-strained dots created by the strain-induced band-gap modulation.

AB - We have used spatially and time-resolved photoluminescence (PL) spectroscopy recorded using a synchronized excitation method in order to investigate the mechanisms for the dynamic PL modulation of GaAsAlAs quantum wells by two-dimensional (2D) standing surface acoustic waves (SAWs). It is clearly demonstrated that a square array of dynamic quantum dots (DQDs) is formed, which oscillates with a repetition interval equal to half of the SAW period. A 2D flatband condition appears between the DQD formations. The spatial modulation of the PL intensity is attributed to exciton migration into the tensile-strained dots created by the strain-induced band-gap modulation.

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Dimensional oscillation in GaAsAlAs quantum wells by two-dimensional standing surface acoustic waves

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