Observation of huge nonlinear absorption enhancement near exciton resonance in GaN

Observation of huge nonlinear absorption enhancement near exciton resonance in GaN

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...

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Veröffentlicht in:Applied physics letters 2003-10, Vol.83 (15), p.3087-3089
Hauptverfasser: Lin, Kung-Hsuan, Chern, Gia-Wei, Huang, Yin-Chieh, Keller, Stacia, DenBaars, Steven P., Sun, Chi-Kuang
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container_end_page 3089
container_issue 15
container_start_page 3087
container_title Applied physics letters
container_volume 83
creator Lin, Kung-Hsuan
Chern, Gia-Wei
Huang, Yin-Chieh
Keller, Stacia
DenBaars, Steven P.
Sun, Chi-Kuang
description 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 ∼150 fs in bulk GaN, which is close to the exciton ionization time.
doi_str_mv 10.1063/1.1619218
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title Observation of huge nonlinear absorption enhancement near exciton resonance in GaN
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