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Wavelength selective photoexcitation of picosecond acoustic-phonon pulses in a triple GaAs/Al0.3Ga0.7As quantum well structure

Wavelength selective photoexcitation of picosecond acoustic-phonon pulses in a triple GaAs/Al0.3Ga0.7As quantum well structure
Wavelength selective photoexcitation of picosecond acoustic-phonon pulses in a triple GaAs/Al0.3Ga0.7As quantum well structure
Ultrashort coherent phonon-pulse generation and detection is investigated in a GaAs–Al0.3Ga0.7As quantum well structure containing three wells of different widths using an optical pump and probe method. The pump photon energy is tuned to the region of the hh1–e1 transition energies of the wells and the probe photon energy is chosen for detection of the phonon pulses that reach the sample surface. By studying the dependence of the probe reflectance change on the pump photon energy, we demonstrate the possibility of wavelength-selective excitation of picosecond acoustic-phonon pulses in quantum wells.
ultrafast phenomena, phonon, multilayer, picosecond, quantum well
0921-4526
205-208
Matsuda, O.
db637c2a-8ee1-42d0-a24b-7afe03945570
Ishii, I.
af4850e7-5bc1-49c3-96f6-a785848469a3
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
Ishii, I.
af4850e7-5bc1-49c3-96f6-a785848469a3
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., Ishii, I., Fukui, T., Baumberg, J.J. and Wright, O.B. (2002) Wavelength selective photoexcitation of picosecond acoustic-phonon pulses in a triple GaAs/Al0.3Ga0.7As quantum well structure. Physica B: Condensed Matter, 316-317, 205-208. (doi:10.1016/S0921-4526(02)00459-3).

Record type: Article

Abstract

Ultrashort coherent phonon-pulse generation and detection is investigated in a GaAs–Al0.3Ga0.7As quantum well structure containing three wells of different widths using an optical pump and probe method. The pump photon energy is tuned to the region of the hh1–e1 transition energies of the wells and the probe photon energy is chosen for detection of the phonon pulses that reach the sample surface. By studying the dependence of the probe reflectance change on the pump photon energy, we demonstrate the possibility of wavelength-selective excitation of picosecond acoustic-phonon pulses in quantum wells.

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Published date: May 2002
Keywords: ultrafast phenomena, phonon, multilayer, picosecond, quantum well
Organisations: Quantum, Light & Matter Group

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Local EPrints ID: 14620
URI: http://eprints.soton.ac.uk/id/eprint/14620
ISSN: 0921-4526
PURE UUID: bb297d14-1aa7-4e34-b3d5-aad980b7221e

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Date deposited: 23 Feb 2005
Last modified: 16 Dec 2019 19:26

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