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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
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.
1550-235X
115330-[13pp]
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.
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), 115330-[13pp]. (doi:10.1103/PhysRevB.71.115330).

Record type: Article

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.

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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: 02 Dec 2019 19:39

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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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