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Refractive Index Change of Dithienylethene in Bulk Amorphous Solid Phase

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Copyright (c) 1999 The Japan Society of Applied Physics
, , Citation Tsuyoshi Kawai et al 1999 Jpn. J. Appl. Phys. 38 L1194 DOI 10.1143/JJAP.38.L1194

1347-4065/38/10B/L1194

Abstract

A diarylethene derivative, 1,2-bis(5-(4-tert-butylphenyl)-2,4-dimethylthiophen-3-yl)- 3,3,4,4,5,5-hexafluorocyclopentene, forms stable amorphous solid with Tg of 68°C. Reversible photochromism in the amorphous solid film is observed upon alternate irradiation with UV (e.g. 313 nm) light and visible (580 nm) light. The refractive index of the solid film changed by as much as 3.8×10-2 along with the photoisomerization.

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10.1143/JJAP.38.L1194