| Autor: |
Tomov, I. V., VanWonterghem, B., Dvornikov, A. S., Dutton, T. E., Rentzepis, P. M. |
| Zdroj: |
Journal of the Optical Society of America B: Optical Physics; July 1991, Vol. 8 Issue: 7 p1477-1482, 6p |
| Abstrakt: |
We report experimental results for the third-order nonlinear properties of thin polymer films doped with azo dyes, which have long-lived triplet states and can undergo reversible photochromic reactions. Cast films of Disperse Red 1 and Methyl Red in polystyrene and polymethyl methacrylate were investigated by degenerate four-wave mixing with a low-power cw mode-locked laser. Polarization properties and the time dependence of the laser-induced gratings were investigated, and results were compared with those obtained for liquid solutions of the dye in the respective monomers. A phase-conjugate reflectivity of 1% was observed for Disperse Red 1 in polystyrene, with no long-term degradation under laser irradiation. |
| Databáze: |
Supplemental Index |
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