A Fast-Response and Helicity-Dependent Lens Enabled by Micro-Patterned Dual-Frequency Liquid Crystals
A Fast-Response and Helicity-Dependent Lens Enabled by Micro-Patterned Dual-Frequency Liquid Crystals
复制标题
由微图案双频液晶实现的快速响应和螺旋度相关的透镜
DOI：
10.3390/cryst9020111
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发表时间：
2019-02-01
期刊：
影响因子：
2.7
通讯作者：
Hu, Wei
中科院分区：
文献类型：
--
作者：
Duan, Wei;Chen, Peng;Hu, Wei
液晶由于其大的双折射性和可通过外场连续调谐性而成为可调谐光学元件的优秀候选者。采用动态光刻技术制作了一种集成Pancharatnam-Berry相位的双频液晶透镜。所提出的透镜具有独特的偏振相关特性和高达95%的超高效率。仅通过改变施加电场的频率，就可以测量出非聚焦状态和聚焦状态之间的切换时间，单位为亚毫秒。本工作为快速响应、高效率、螺旋度相关的透镜提供了一种新的设计思路，具有制作简单、功耗低等优点。
Liquid crystals are excellent candidates for tunable optical elements due to their large birefringence and continuous tunability by external fields. A dual-frequency liquid crystal lens integrated with Pancharatnam-Berry phase was fabricated via a dynamic photo-patterning technique. The proposed lens exhibited distinctive polarization-dependent characteristics and ultra-high efficiency rates of up to 95%. Via merely alternating the frequency of the applied electric field, the switching time between unfocused and focused states was measured in submilliseconds. This work supplies a new strategy for fast-response, high-efficiency and helicity-dependent lens with merits of easy fabrication and low power consumption.