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Photoinduced transparency of effective three-photon absorption coefficient for femtosecond laser pulses in thin films
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10.1063/1.3591978
/content/aip/journal/apl/98/20/10.1063/1.3591978
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/20/10.1063/1.3591978
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The PD of when irradiated with a 532 nm laser with an intensity of . Inset shows expanded band gap region. The band gap of the as prepared and photodarkened film is 1.73 eV and 1.72 eV, respectively.

Image of FIG. 2.
FIG. 2.

(a) Normalized transmittance as a function of position in open aperture Z-scan using 800 nm 100 fs pulses. Symbolss represent data for the as-prepared and photodarkened film; solid lines are respective theoretical fit. The effective three-photon absorption coefficient of the as prepared and photodarkened film is and , respectively. The experimental results clearly indicate the photoinduced transparency in three-photon absorption coefficient by an order of magnitude. (b) Describing the numerical fit of the experimental data for two-photon and effective three-photon absorption processes. From the figure it is clear that an effective three-photon absorption process gives the best fit to the experimental data.

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/content/aip/journal/apl/98/20/10.1063/1.3591978
2011-05-19
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoinduced transparency of effective three-photon absorption coefficient for femtosecond laser pulses in Ge16As29Se55 thin films
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/20/10.1063/1.3591978
10.1063/1.3591978
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