[OPTICAL REVIEW Vol. 2, No. 4 (1995) 236-238]

Thermally Stable and Resonance Enhanced Large Nonlinear Optical Properties in Poled Silica Films Doped with Thiazole Azo Dye

Hideki NAKAYAMA,1 Okihiro SUGIHARA,2 Hisashi FUJIMURA,2 Ryoka MATSUSHIMA1 and Naomichi OKAMOTO1

1The Graduate School of Electronic Science and Technology, Shizuoka University, 2Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, 432 Japan

(Received May 9, 1995; Accepted June 20, 1995)

Sol-gel processed poled silica films doped with novel nonlinear organic materials, thiazole azo dye (TA), are prepared in high concentration. Resonance enhanced second-order nonlinear optical coefficient of d33=154 pm/V is obtained from TA doped silica film (40 wt%) for the fundamental wavelength of 1064 nm. The value d33 is unvaried for at least 100 h under a high temperature condition (100°C) without any relaxation. Wave-length dependent second-order nonlinearity is also measured.

Key words : thiazole azo dye, second harmonic generation (SHG), poled silica film, resonance enhanced SHG, thermal stability