期刊
APPLIED PHYSICS LETTERS
卷 83, 期 15, 页码 3087-3089出版社
AMER INST PHYSICS
DOI: 10.1063/1.1619218
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Huge excitonic enhancement of two-photon absorption near the exciton-transition energy was observed in the GaN system. The peak value of the nonlinear absorption coefficient is at least 1500 cm/GW, corresponding to an enhancement factor of >100. The room temperature exciton dephasing time is also obtained based on a spectral analysis to be similar to150 fs in bulk GaN, which is close to the exciton ionization time. (C) 2003 American Institute of Physics.
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