Simultaneous Observation of Coherent GaSb-like and AlSb-like Longitudinal Optical Phonons in GaSb/AlSb Superlattices
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概要
- 論文の詳細を見る
We have investigated coherent longitudinal optical (LO) phonons in GaSb/AlSb superlattices. The coherent AlSb-like LO phonon in the barrier layer and the coherent GaSb-like LO phonon in the well layer have been simultaneously observed. The GaSb-like LO phonon exhibits a cosine-type oscillation, which is the dominant signal. We have analyzed the initial phase of the AlSb-like LO phonon by plotting the imaginary part of the Fourier-transform components as a function of the real part, the so-called Cole–Cole's plot. We have found from this plot that the difference in the initial phase between the GaSb-like and AlSb-like LO phonons is about 90 degrees: The AlSb-like LO phonon has a sine-type oscillation. This difference in the initial phase indicates the difference in the generation mechanism between the coherent GaSb-like and AlSb-like LO phonons. We discuss the generation mechanism based on some proposed models.
- Physical Society of Japanの論文
- 2001-09-15
著者
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Nakayama Masaaki
Department Of Applied Physics Faculty Of Engineering Osaka City University
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Takeuchi Hideo
Department Of Applied Physics Faculty Of Engineering Osaka City University
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Harima Hiroshi
Department Of Applied Physics Osaha University
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Mizoguchi Kohji
Department Of Applied Physics Faculty Of Engineering Osaka City University
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KUROYANAGI Kazuyoshi
ATR Adaptive Communications Research Laboratories
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Aida Tahito
Atr Adaptive Communications Research Laboratories
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Nakajima Makoto
Department Of Applied Physics Osaha University
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Nakayama Masaaki
Department of Applied Physics, Faculty of Engineering, Osaka City University,
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Harima Hiroshi
Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871
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Aida Tahito
ATR Adaptive Communications Research Laboratories,
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Nakajima Makoto
Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871
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Takeuchi Hideo
Department of Applied Physics, Faculty of Engineering, Osaka City University,
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