Concentration dependence of photoinduced birefringence and second-order susceptibility in all-optical poling

Matti Virkki; Martti Kauranen; Arri Priimagi

doi:10.1117/12.922438

1 May 2012 Concentration dependence of photoinduced birefringence and second-order susceptibility in all-optical poling

Matti Virkki, Martti Kauranen, Arri Priimagi

Proceedings Volume 8424, Nanophotonics IV; 84242S (2012) https://doi.org/10.1117/12.922438
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

We study photoinduced molecular reorientation of the azobenzene derivative Disperse Red 1 embedded in poly(4-vinylpyridine) polymer matrix. Photoinduced axial order leading to birefringence and polar order leading to second-order nonlinear optical (NLO) response are induced by purely optical means. These two photoinduced properties are found to exhibit markedly different dependences on the chromophore concentration: the photoinduced second-order NLO response reaches its peak already at 23 wt. % concentration while the photoinduced birefringence increases up to 51 wt. % concentration. The results show that chromophore-chromophore intermolecular interactions work against polar order already at modest concentration. The axial order, on the other hand, is not as easily affected by such interactions.

Citation Download Citation

Matti Virkki, Martti Kauranen, and Arri Priimagi "Concentration dependence of photoinduced birefringence and second-order susceptibility in all-optical poling", Proc. SPIE 8424, Nanophotonics IV, 84242S (1 May 2012); https://doi.org/10.1117/12.922438

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