红外与毫米波学报2017，Vol.36Issue(5)：599-605,7.DOI:10.11972/j.issn.1001-9014.2017.05.015
非均匀分布的纳米银掺杂的聚合物分散液晶全息光栅等效电路建模
Equivalent circuit modeling of non-uniformly distributed nano Ag doped Holographic polymer dispersed Liquid Crystal Grating
摘要
Abstract
The diffraction efficiency of the holographic polymer-dispersed liquid crystal (H-PDLC) grating can be adjusted by the applied electrical field.Doping Ag nanoparticles (NPs) can effectively reduce the driving voltage of the grating.Due to the influence of polymerization kinetics,Ag NPs are distributed unevenly in the grating,namely,the distribution of Ag NPs in the polymer and LC area is not uniform and exhibit different electric field control characteristics.The relationship between the threshold driving voltage and the frequency of the applied field can be studied by equivalent circuit model.According to Wagner-Maxwell effect,in this paper,the equivalent circuit model of Ag NPs surrounded by LC and polymer,respectively,was established.Under the condition of different concentration of Ag NPs within the LC area,the relaxation time and relaxation frequency of Ag NPs doped H-PDLC grating was studied.The low driving voltage can be further obtained by adjusting the frequency of applied electric field.The distribution of Ag NPs in the grating can be determined by the optimum driving electric field frequency range,and it is confirmed that the Ag NPs are concentrated in the LC strip and distributed in a small amount in the polymer stripes.关键词
聚合物分散液晶全息光栅/弛豫振荡频率/阈值驱动电压/非均匀分布Key words
holographic polymer dispersed liquid crystal/relaxation oscillation frequency/threshold driving voltage/non-uniform distribution分类
数理科学引用本文复制引用
刘悠嵘,郑继红,桂坤,王康妮,庄松林..非均匀分布的纳米银掺杂的聚合物分散液晶全息光栅等效电路建模[J].红外与毫米波学报,2017,36(5):599-605,7.基金项目
上海市重点学科项目第三期(S30502)、国家重大科学仪器设备开发专项资助课题(2012YQ15008720)Supported by the Shanghai Key Subject Construction funding(s30502) （S30502）
National Key Scientific Instrument Development Projects (2012YQ15008720) （2012YQ15008720）
