Department of Physics, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Opt Lett. 2011 Feb 15;36(4):502-4. doi: 10.1364/OL.36.000502.
A polarization-independent and high-diffraction-efficiency Fresnel lens is developed based on blue phase liquid crystals (BPLCs). The optically isotropic characteristic of BPLCs is used to produce a polarization-independent Fresnel lens. The small optical phase shift of BPLCs that is induced by the Kerr effect is sufficient for the BPLC Fresnel lens to have high theoretical and experimental diffraction efficiencies of 41% and ∼34%, respectively. An electrically erasable memory effect in the focusing diffraction at an electric field E>4.44 V/μm is observed. The electro-optical properties of the BPLC Fresnel lens are analyzed and discussed.
基于蓝相液晶（BPLC）开发了一种偏振无关且高衍射效率的菲涅耳透镜。BPLC 的各向同性光学特性用于产生偏振无关的菲涅耳透镜。BPLC 中克尔效应引起的小光学相移足以使 BPLC 菲涅耳透镜分别具有 41%和约 34%的高理论和实验衍射效率。在电场 E>4.44 V/μm 下观察到聚焦衍射的电可擦除记忆效应。分析和讨论了 BPLC 菲涅耳透镜的电光特性。
