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

被引:4
作者
Belfield, KD [1 ]
Hagan, DJ [1 ]
Liu, Y [1 ]
Negres, RA [1 ]
Fan, MG [1 ]
Hernandez, FE [1 ]
机构
[1] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA
来源
ORGANIC PHOTOREFRACTIVES, PHOTORECEPTORS, AND NANOCOMPOSITES | 2000年 / 4104卷
关键词
photochromic; fulgide; two-photon absorption; photoisomerization; holographic; photorefractive;
D O I
10.1117/12.406480
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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 (max) = 385 mn, using 775 nm fs pulses. The resulting photoisomer has a lambda (max) = 582 nn. The kinectic rate content for the isomerization reaction was 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 sigma2=10.3 x 10(-48) cm(4).s/photon was measured using Z-scan, supporting a two-photon induced isomerization process.
引用
收藏
页码:15 / 22
页数:4
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