【摘 要】
：
Electric fields modify the optical properties of nematic liquid crystals[NLCs]by changing the nematic molecular orientation or order parameters,which enables electro-optic applications of NLCs.However,the field-induced optic change is unde-sirable in some
【机 构】
：
College of Electronic and Optical Engineering and College of Microelectronics,Nanjing University of
论文部分内容阅读
Electric fields modify the optical properties of nematic liquid crystals[NLCs]by changing the nematic molecular orientation or order parameters,which enables electro-optic applications of NLCs.However,the field-induced optic change is unde-sirable in some cases.Here,we experimentally demonstrate that polymer stabilization weakens the birefringence change of NLCs caused by the nanosecond electrically modified order parameter effect.The birefringence change is reduced by 65％ in the NLC doped with 25％ reactive monomer,which is polymerized close to the nematic-to-isotropic phase transition.This technique could be used in liquid crystal devices where the birefringence change is unfavored.
其他文献
以我国2012年以来先后启动的三个批次的智慧城市试点政策为准自然实验,基于2005-2019年中国231个地级市的面板数据,运用多期双重差分法,从韧性发展视角考察了智慧城市试点政策对城市发展质量的影响.结果 表明:智慧城市试点政策的实施能够显著提升城市发展质量,并在一系列稳健性检验下成立.智慧城市试点政策能够通过互联网集聚和绿色技术创新来提高城市发展质量.基于不同的城市特征和地区规模,智慧城市试点的政策效应具有显著的异质性,且基础设施薄弱的城市也能通过智慧网络体系规划实现城市高质量发展.智慧城市试点政策存
The kuruma shrimp Marsupenaeus japonicus is one of the most commercially important shrimp species in the world.Low salinity would affect the penetration and immunity,and even led to its death of the shrimp.However,little is known about the molecular mecha
美联储已于2021年11月缩减资产购买(Taper),不确定之处在于何时加息以及加息的次数.受迫于高通胀压力,在12月的美联储议息会议后,美联储又决定加速Taper,每月减少购债规模翻倍,并定于2022年3月底结束Taper.美联储退出QE4的溢出效应,或令使金融市场重现大幅震荡,大宗商品价格大幅下跌.
Polarization underwater imaging is of great potential to target detection in turbid water.Typical methods are challenged by the requirement on degrees of polarization[DoPs]of both target light and backscattering.A polarization descattering im-aging method
退偏器在深紫外光刻机照明系统中具有重要作用.尽管相关的设计、制造、性能评估已有一些报道,但是,相应的检测手段大多工作在可见光波段,目前仍缺乏直接对深紫外特定波长应用的退偏器进行性能检测的方法.本文提出了一种与激光光强波动无关的248 nm退偏器检测方法,使用248.372 nm波长的KrF准分子激光器作为光源,利用预起偏和偏振分光设计克服了激光光强波动造成的不利影响.误差分析表明,该方法适用于退偏器性能检测,绝对系统误差小于0.1226％,随机误差约0.2000％.验证实验和稳定性实验表明,测量偏振度均值
We introduce a new class of partially coherent asymmetric array beams.When the beam propagates,the spectral density of each lobe and the corresponding degree of coherence have rotating behavior.Especially,not only can array-like lattices revolve arbitrari
Using alternative plant-derived dietary protein to replace fishmeal,combined with practical evaluation indexes,is a recent focus for aquaculture practices.An 8-week feeding experiment with giant freshwater prawn Macrobrachium rosenbergii post-larvae was c
针对调频连续波干涉测量系统中半导体激光光源存在波长漂移的问题,提出了一种基于干涉腔的调频连续波激光波长稳定性测量方法.首先推导了波长漂移量的测量理论,确定了位移-波长漂移量的变化系数,然后设计了拍频信号波长漂移量的解调算法,最后搭建了调频连续波干涉腔测量系统并进行了实验验证.结果 表明,波长漂移量的测量分辨率为0.016 pm,波长漂移解算速度达50/s(测量时间为0.02 s),相比光学拍频法和干涉比较法,测量速度有较大的提高.激光器持续工作1h,测量标准差为0.049 pm,平均中心波长稳定性在0.1
创新活动的高风险与外部性是创新水平通常低于最优值的重要原因,而产业扶持是矫正创新体系市场失灵的重要手段.首先,在企业创新决策理论模型的基础上,结合市场势力与市场壁垒的变化,从理论层面验证了产业扶持对企业创新的作用机制.其次,基于产品投入产出网络和上下游产业关系,通过递归方程求解出产业偏离度指标,量化了产业扶持的直接与间接效应.最后,通过经验分析发现:(1)产业扶持显著促进了企业创新水平的提升,且其作用效果呈边际递减倾向;(2)产业扶持主要通过企业市场势力的提高与市场壁垒的降低对企业创新产生影响;(3)市场
A counter-surface plasmon polariton lens[CSPPL]is proposed to perform stable nanoparticle trapping by providing up to 120kbToptical potential depth.The optical potential depth is related to the incident angle and phase difference of the light incident on