Second-order nonlinear optical properties and polar order relaxation dynamics in a cyano-chromophore grafted polyurethane polymer
✍ Scribed by Aleksandra Apostoluk; Jean-Michel Nunzi; Kwang-Sup Lee
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 161 KB
- Volume
- 263
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
The all-optical recording of a microscopic second-order nonlinear susceptibility in a new azo dye pendant polyurethane polymer is investigated. An experimental configuration which permits self-phase matched was used. The peak value of the phase-matched lightinduced second order nonlinear optical susceptibility v (2) measured at 1.06 lm reaches 62 pm/V at room temperature, which corresponds to a molecular orientation ratio of 30%. Temporal stability of the induced polar order measured by second harmonic generation revealed a reduced decay rate of the v (2) value in comparison to Disperse Red 1 pendant poly(methyl methacrylate).