Refractive index control and grating fabrication of 4 '-N,N-dimethylamino-N-methyl-4-stilbazolium tosylate crystal

Authors
Cai, B Hattori, T Deng, HH Komatsu, K Zawadzki, C Keil, N Kaino, T
Citation
B. Cai et al., Refractive index control and grating fabrication of 4 '-N,N-dimethylamino-N-methyl-4-stilbazolium tosylate crystal, JPN J A P 2, 40(9AB), 2001, pp. L964-L966
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
40
Issue
9AB
Year of publication
2001
Pages
L964 - L966
Database
ISI
SICI code
Abstract
The refractive index of nonlinear optical ionic crystal 4 ' -N,N-dimethylam ino-N-methyl-4-stilbazolium tosylate (DAST) was controlled by a photobleach ing technique. The ellipticity of the DAST refractive index ellipsoid decre ased after the irradiation of a 532 nm laser. By means of the photobleachin g effect we fabricated a grating on DAST single crystals by two-beam interf erence. The calculation based on the diffraction efficiency indicates that the depth of refractive index change can be extended to 5.75-7.38 mum by 2. 08 W/cm(2) irradiation power. This result is promising for the fabrication of DAST waveguides; by photobleaching.