Nonlinear optical properties of the main-chain-type liquid crystalline polymers: III. Piling effect of the thin films on SHG

Tadahiro Asada

doi:10.1117/12.365796

14 October 1999 Nonlinear optical properties of the main-chain-type liquid crystalline polymers: III. Piling effect of the thin films on SHG

Tadahiro Asada

Author Affiliations +

Proceedings Volume 3800, Liquid Crystals III; (1999) https://doi.org/10.1117/12.365796
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The second harmonic generation (SHG) of liquid crystalline main-chain type polymers were investigated. The sample polymer is a copolymer of 2-hydroxy-6-naphtoic acid with 4- hydroxy-benzoic acid, in the composition ratio (equals 30/70). The nonlinear optical coefficient d_exp of the samples prepared by mechanical extension at the liquid crystalline temperature is about 5 pm/V. Quasi-Phase Matching seems to be performed by piling the mechanically oriented thin films with alternatively directed machine direction. More than 8 times SH intensity value of that for 1 sheet of film was observed. For this trials, films being immersed in equal refractive index liquid crystals were used.

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Tadahiro Asada "Nonlinear optical properties of the main-chain-type liquid crystalline polymers: III. Piling effect of the thin films on SHG", Proc. SPIE 3800, Liquid Crystals III, (14 October 1999); https://doi.org/10.1117/12.365796

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