向列相液晶器件光调制性能研究
Study on Optical Modulation Performance of Nematic Liquid Crystal Devices
王萧 1鲁小鑫 1张雪凤 1王浪 1乌日娜1
作者信息
- 1. 沈阳理工大学 理学院,沈阳 110159
- 折叠
摘要
液晶的折射率易受外加电压和温度的影响,据此可获得电场和温度可调制器件.为改善液晶器件对光的调制性能,制备了向列相液晶器件,并对其调制性能进行理论模拟和实验研究.首先研究液晶器件的透过光强和相位延迟随电压变化关系,结果显示,相同电压下,增大器件厚度,光强调制曲线的峰谷数增多,相位调制量增大,其中电压在0.8～3 V范围内,相位延迟曲线变化较明显,厚度为4、6 和10 μm的器件可分别获得约 1.21π、1.87π和 3.19π rad的相位调制量.其次对厚度为4μm的器件进行温度可调制性能的研究,结果显示,温度从20℃升至45℃时,获得的温度可调制量约为0.29π rad.改变电场或温度均能引起液晶的折射率变化,从而实现对光的调控,适当增加液晶器件厚度可获得较大的相位调制量.研究结果对液晶光调制器件的性能改善及应用具有重要参考意义.
Abstract
The refractive index of liquid crystal is susceptible to the voltage and temperature,and the electric field and temperature modulable devices can be obtained.In order to improve the optical modulation performance of liquid crystal devices,nematic liquid crystal devices are fabricated,and their modulation performance is theoretically simulated and experimentally studied.Firstly,the rela-tionship between the light intensity and phase delay of the liquid crystal device and the voltage is studied.Under the same voltage,increasing the thickness of the device,the number of peaks and valleys of the light intensity modulation curve increases,and the phase modulation amount increa-ses.In the range of 0.8～3 V,the phase delay curve changes obviously.Devices with thickness of 4,6 and 10 μm can get phase modulation of about 1.21π,1.87π and 3.19π rad,respectively.Sec-ondly,the temperature modulation performance of 4 μm device is studied.When the temperature in-creases from 20℃to 45℃,the temperature modulation amount is about 0.29π rad.Therefore,changing the electric field or temperature can cause the refractive index of the liquid crystal to change,so as to realize the regulation of light.A larger phase modulation can be obtained by appro-priately increasing the thickness of the liquid crystal device.The research results are important refer-ence for the performance improvement and application of liquid crystal optical modulators.
关键词
液晶光调制器/向列相液晶/光强调制/相位调制Key words
liquid crystal light modulator/nematic liquid crystal/light intensity modulation/phase modulation引用本文复制引用
基金项目
202辽宁省"揭榜挂帅"科技计划重点项目()
沈阳理工大学光选科研团队建设项目()
辽宁省博士科研启动基金计划项目(2021-BS-161)
出版年
2024
NETL
NSTL
万方数据