title: Rapid fabrication of an electrically switchable liquid crystal Fresnel zone lens.
abstract: 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.
authors.affiliation: Institute of Information Optical Engineering, Soochow University, Suzhou 215006, China.
authors.forename: Yimin
authors.initials: Y
authors.lastname: Lou
authors.forename: Qingkun
authors.initials: Q
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Yaocheng
authors.initials: Y
authors.lastname: Shi
authors.forename: Sailing
authors.initials: S
authors.lastname: He