Two-photon photochromism of a photorefractive organic material for holographic recording

Kevin D. Belfield; David J. Hagan; Yong Liu; Raluca A. Negres; Meigong Fan; Florencio Eloy Hernandez

doi:10.1117/12.406480

13 November 2000 Two-photon photochromism of a photorefractive organic material for holographic recording

Kevin D. Belfield, David J. Hagan, Yong Liu, Raluca A. Negres, Meigong Fan, Florencio Eloy Hernandez

Proceedings Volume 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites; (2000) https://doi.org/10.1117/12.406480
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

We report the two-photon induced photoisomerization of 3-[1-(1,2- dimethyl-1H-indol-3-yl)-ethylidene]-4-isopropylidene-dihydro-furan- 2,5-dione (1), a photochromic compound with (lambda) _maxequals385nm, using 775 fs pulses. The resulting photoisomer has a (lambda) _maxequals582 nm. The kinectic rate contant for the isomerization reaction w as measured at two different intensities (two different powers), showing a quadratic dependence with respect to the pump intensity. Results of pump-probe solution phase experiments and guest/host polymer thin film interferometric imaging studies are shown. A two-photon absorption molecular cross-section (sigma) 2equals10.3 x 10^{- 45} cm⁴ s/photon was measured using Z-scan, supporting a two photon induced isomerization process.

Citation Download Citation

Kevin D. Belfield, David J. Hagan, Yong Liu, Raluca A. Negres, Meigong Fan, and Florencio Eloy Hernandez "Two-photon photochromism of a photorefractive organic material for holographic recording", Proc. SPIE 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites, (13 November 2000); https://doi.org/10.1117/12.406480

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