Acoustic phonon generation and detection in GaAs/Al0.3Ga0.7As quantum wells with picosecond laser pulses
Acoustic phonon generation and detection in GaAs/Al0.3Ga0.7As quantum wells with picosecond laser pulses
Picosecond acoustic-phonon pulse generation and detection is investigated in a sample containing three GaAs/Al0.3Ga0.7As quantum wells of different thickness with an interferometric optical pump and probe technique. The pump photon energy is tuned through the hh1-e1 transitions of each well and the probe photon energy is chosen to allow the detection of the phonon pulses at the sample surface. The phonon pulse shapes are explained with a model that relates the carrier wave functions to the acoustic strain, and the acoustic strain to the detected optical reflectance and phase changes.
115330-[13pp]
Matsuda, O.
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Tachizaki, T.
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Fukui, T.
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Baumberg, J.J.
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Wright, O.B.
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2005
Matsuda, O.
db637c2a-8ee1-42d0-a24b-7afe03945570
Tachizaki, T.
9b7c624a-7739-4109-b087-d2d11f4c8d90
Fukui, T.
45e47270-70bd-44d7-aae2-c644df8df594
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Wright, O.B.
55c2f008-d20f-4716-9ca8-3ac1da0fed81
Matsuda, O., Tachizaki, T., Fukui, T., Baumberg, J.J. and Wright, O.B.
(2005)
Acoustic phonon generation and detection in GaAs/Al0.3Ga0.7As quantum wells with picosecond laser pulses.
Physical Review B, 71 (11), .
(doi:10.1103/PhysRevB.71.115330).
Abstract
Picosecond acoustic-phonon pulse generation and detection is investigated in a sample containing three GaAs/Al0.3Ga0.7As quantum wells of different thickness with an interferometric optical pump and probe technique. The pump photon energy is tuned through the hh1-e1 transitions of each well and the probe photon energy is chosen to allow the detection of the phonon pulses at the sample surface. The phonon pulse shapes are explained with a model that relates the carrier wave functions to the acoustic strain, and the acoustic strain to the detected optical reflectance and phase changes.
Text
PRB05_QWphonons.pdf
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Published date: 2005
Identifiers
Local EPrints ID: 15268
URI: http://eprints.soton.ac.uk/id/eprint/15268
ISSN: 1550-235X
PURE UUID: 58762bee-65d9-4fe7-b62b-bdea49fd50e8
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Date deposited: 30 Mar 2005
Last modified: 15 Mar 2024 05:36
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Contributors
Author:
O. Matsuda
Author:
T. Tachizaki
Author:
T. Fukui
Author:
J.J. Baumberg
Author:
O.B. Wright
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