Enhanced Photorefractive and Third-Order Nonlinear Optical Properties of 5CB-Based Polymer-Dispersed Liquid Crystals by Graphene Doping

被引：21

作者：

Li, Shulei ^{[1
]}

Fu, Ming ^{[1
]}

Sun, Haiyan ^{[1
]}

Zhao, Yuqiong ^{[1
]}

Liu, Yongchuan ^{[1
]}

He, Dawei ^{[1
]}

Wang, Yongsheng ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Inst Optoelect Technol, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 31期

基金：

美国国家科学基金会;

关键词：

CARBON NANOTUBES; HYBRID MATERIALS; PLASMONICS; PORPHYRIN; PHOTONICS;

D O I：

10.1021/jp505289r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The enhanced photorefractive and third-order nonlinear optical properties of graphene/graphene oxide (GO)-doped polymer-dispersed liquid crystals (PDLC) were studied by two-beam coupling and z-scan methods. A higher interior electric field will be produced according to the photorefractive performance because of the high electrical conductivity of graphene. The doping of graphene also improved the uniformity of alignments of 4-cyano-4'-pentylbiphenyl (5CB) in PDLC because the rod-shaped liquid crystals tended to align along the surface of sheet structures and the alternate positions of the hexagons on the graphene surface matched well with the alkyl chains of 5CB molecules. Higher third-order nonlinear refraction and absorption coefficient can be attributed to the geometric relationship between graphene and 5CB. The GO-doped samples exhibited higher photorefractive efficiency, third-order nonlinear refraction, and absorption coefficient than undoped PDLC samples, but lower values than the graphene-doped samples because of the nonconducting nature of GO and/or weaker surface matching.

引用

页码：18015 / 18020

页数：6

共 4 条

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[4] Donor-acceptor molecules based on benzothiadiazole: Synthesis, X-ray crystal structures, linear and third-order nonlinear optical properties
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