Lou Yimin, Liu Qingkun, Wang Hui, Shi Yaocheng, He Sailing
Institute of Information Optical Engineering, Soochow University, Suzhou 215006, China.
Appl Opt. 2010 Sep 10;49(26):4995-5000. doi: 10.1364/AO.49.004995.
Based on a nanoimprint technique, a new method is proposed for the rapid fabrication of an electrically switchable liquid crystal Fresnel zone lens (SLCFZL). The flow chart of the proposed fabrication method for a SLCFZL is given and a binary SLCFZL is experimentally demonstrated using the proposed method. The diffraction efficiency of the SLCFZL is continuously tunable through an external electric field, and the driving voltage is relatively low (<15V(rms)). The measured maximal diffraction efficiency reaches ∼35% for a linearly polarized light, which is close to the theoretical value of 40.5%. The focusing and imaging properties of the SLCFZL are also experimentally tested.
基于纳米压印技术，提出了一种快速制备电可切换液晶菲涅耳波带片（SLCFZL）的新方法。给出了所提出的SLCFZL制备方法的流程图，并通过实验证明了使用该方法制备的二元SLCFZL。SLCFZL的衍射效率可通过外部电场连续调节，且驱动电压相对较低（<15V（rms））。对于线偏振光，测得的最大衍射效率达到约35%，接近理论值40.5%。还对SLCFZL的聚焦和成像特性进行了实验测试。
