Nonlinear birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells
Nonlinear birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells
We report a study of the nonlinear birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a nonlinear birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
Eldridge, P.S.
775aabc8-06a8-4581-8a92-05c07efbdfd0
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Henini, M.
dffaac17-caab-4a18-9eb6-c858d8bb1ed2
Harley, Richard T.
54613031-f60f-45f4-9b20-e49bcfd53b77
7 January 2010
Eldridge, P.S.
775aabc8-06a8-4581-8a92-05c07efbdfd0
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Henini, M.
dffaac17-caab-4a18-9eb6-c858d8bb1ed2
Harley, Richard T.
54613031-f60f-45f4-9b20-e49bcfd53b77
Eldridge, P.S., Lagoudakis, P.G., Henini, M. and Harley, Richard T.
(2010)
Nonlinear birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells.
Physical Review B, 81 (3).
(doi:10.1103/PhysRevB.81.033302).
Abstract
We report a study of the nonlinear birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a nonlinear birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
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Published date: 7 January 2010
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Local EPrints ID: 153381
URI: http://eprints.soton.ac.uk/id/eprint/153381
ISSN: 1550-235X
PURE UUID: 144d82a5-38f2-41fe-bbfc-15ceb5d470d7
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Date deposited: 19 May 2010 16:02
Last modified: 14 Mar 2024 01:27
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Author:
P.S. Eldridge
Author:
P.G. Lagoudakis
Author:
M. Henini
Author:
Richard T. Harley
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