Abstract
We report on the first time measurement, using four-wave mixing, of the dephasing time of excitons in a high-quality GaN/Al0.05Ga0.95N quantum well. The comparison with the exciton-spin lifetime, determined via pump-probe spectroscopy using polarized laser pulses, shows that spin relaxation occurs in the motional narrowing regime.
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References
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J. Besbas, A. Gadalla, M. Gallart, O. Crégut, B. Hönerlage, P. Gilliot, E. Feltin, J.-F. Carlin, R. Butté, and N. Grandjean, “Spin relaxation of free excitons in narrow GaN/AlxGa1−xN quantum wells” Phys. Rev. B 82, 195302 (2010).
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Gallart, M. et al. (2015). Phase and Spin Relaxation Dynamics in High-Quality Single GaN/AlGaN Quantum Well. In: Bigot, JY., Hübner, W., Rasing, T., Chantrell, R. (eds) Ultrafast Magnetism I. Springer Proceedings in Physics, vol 159. Springer, Cham. https://doi.org/10.1007/978-3-319-07743-7_5
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DOI: https://doi.org/10.1007/978-3-319-07743-7_5
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