Optical diffractometry of anisotropic holographic structure composed of liquid crystal and polymer phases with extended Bragg modes

被引：3

作者：

Kakiuchida, H. ^{[1
]}

Tazawa, M. ^{[1
]}

Yoshimura, K. ^{[1
]}

Ogiwara, A. ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Mat Res Inst Sustainable Dev, Moriyama Ku, Nagoya, Aichi 4638560, Japan

[2] Kobe City Coll Technol, Dept Elect Engn, Nishi Ku, Kobe, Hyogo 6512194, Japan

来源：

THIN SOLID FILMS | 2014年 / 571卷

关键词：

Holographic polymer dispersed liquid crystal; Bragg diffraction; Phase separation; Orientational order; Optical anisotropy; Nematic-to-isotropic phase transition; Fourier series; PHOTONIC CRYSTAL; GRATINGS; DIFFRACTION; PHOTOPOLYMERIZATION; LIGHT;

D O I：

10.1016/j.tsf.2013.11.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diffraction spectra at several Bragg modes of holographic polymer dispersed liquid crystals (HPDLCs) were measured individually for two orthogonal polarizations at temperatures below and above nematic-to-isotropic point. Then optical structures of the HPDLCs were quantitatively analyzed based on advanced two-wave coupled wave theory by fitting calculations consistently all at once to the measured diffraction data at not only the first Bragg mode but also the higher order ones, which has never been demonstrated before. The present analysis provided the microscopic information such as the polarization and temperature dependences on harmonic sinusoidal profiles of refractive-index modulation along grating vector, and was examined in validity by comparison with phase-separated morphology observed by scanning electron microscopy. The present analysis allowed you to find the technologically-advanced information, that is, the controllability of fine configuration of LC/polymer phase distribution and the optical anisotropy in the fabrication process. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：431 / 436

页数：6

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