Origins of Kerr phase and orientational phase in polymer-dispersed liquid crystals

被引：25

作者：

Chang, Chia-Ming ^{[1
]}

Lin, Yi-Hsin ^{[1
,4
]}

Reshetnyak, Victor ^{[2
]}

Park, Chui Ho ^{[3
]}

Manda, Ramesh ^{[3
]}

Lee, Seung Hee ^{[3
]}

机构：

[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan

[2] Taras Shevchenko Natl Univ Kyiv, Theoret Phys Dept, UA-01033 Kiev, Ukraine

[3] Chonbuk Natl Univ, Dept BIN Convergence Technol, Jeonju 561756, Jeonbuk, South Korea

[4] Chonbuk Natl Univ, Dept Polymer Nanosci & Technol, Jeonju 561756, Jeonbuk, South Korea

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-SCATTERING; NEMATIC DROPLETS; OPTICAL-PHASE; MODULATION; FILMS; RELAXATION; DYNAMICS; LASER;

D O I：

10.1364/OE.25.019807

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Polymer-dispersed liquid crystals (PDLCs) modulate the amplitude and optical phase of light. The optical phase modulation of PDLC can be dissected into two parts: Kerr phase and orientational phase according to the electro-optical (EO) response. We investigated the origins of the Kerr and orientational phases in PDLCs and their connection with the two-step EO response. The Kerr phase is attributed to LC orientation in the center of LC droplets. The orientational phase results from orientation of LC molecules near LC-polymer interfaces. Both phases can be adjusted by varying the droplet size. The two-step EO response in small droplets (<333 nm) is related to the Kerr and orientational phases, and possibly to rotation of point defects. A modified PDLC model considering the Kerr and orientational phases is proposed. Our findings suggest the possibility of versatile photonic devices using pure optical phase modulation. (C) 2017 Optical Society of America

引用

页码：19807 / 19821

页数：15

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