Second-order optical nonlinearity dominated by molecuar configuration and crystal packing structure for organic optical device design

International Conference on Stereochemistry

August 18-19, 2016 Sao Paulo, Brazil

Takao Tomono

Toppan Printing,Co., Ltd., Japan

Posters & Accepted Abstracts: Med chem

Abstract :

Nonlinear optical organic devices have high potential for compact and high power green and blue laser and high speed optical switching. Especially, nonlinearity in organic crysal is larger than one in inorganic crystal. On the other hand, organic crystal is molecules crystal and the nonlinearity of cystal depend on nonlinearity of molecules, its surrounding and its packing condition. Generally, the molecules with the appropriate donor-acceptor pair exhibit the large second-order optical nonlinearities. However, these molecules tend to form centrosymmetrical structures in crystallization because of their dipole-dipole interaction. We could get P1symmetry crystal by introducing chirality. The crysal size is not large and minimum sized to evaluate optical properties. J.Zyss et al reported crystal�s nonlinearity based on oriented gas model of organic molecules crystal. However, its model is lacking in treatment of space group P1 symmetry. In the case of P1 symmetry, d11 is thought to be largest nonlinear optical coefficient and it is difficult to get phase matching SHG. Nonlinear optical properties on the P1 symmetry crystal was investigated by using oriented gas model, thoretically and experimentally. D11 is largest coefficient, but P1 crystal enable to get large phase matching SHG.

Biography :

Email: Takao.tomono@toppao.co.jp