本文报道了Pancharatnam-Berry位相光学元件的研制[Z.博姆宗湾Biener，V. Kleiner，and E. Hasman，Opt. Lett. \textbf{27}，1141（2002）]，用于基于图案化液晶技术在可见光谱域中工作的波前整形。该器件产生可见光的螺旋模式，通过控制输入圆偏振的旋向性，可以在相反的螺旋度之间进行电光切换。通过级联这种方法，可以实现多个波前螺旋度之间的快速切换，具有潜在的应用于多态光学信息编码。本文所提出的方法可以推广到其他偏振控制的波前整形器件，如可切换透镜、分束器和全息元件。
英文摘要：
We report the realization of a Pancharatnam-Berry phase optical element [Z. Bomzon, G. Biener, V. Kleiner, and E. Hasman, Opt. Lett. \textbf{27}, 1141 (2002)] for wavefront shaping working in the visible spectral domain, based on patterned liquid crystal technology. This device generates helical modes of visible light with the possibility of electro-optically switching between opposite helicities by controlling the handedness of the input circular polarization. By cascading this approach, fast switching among multiple wavefront helicities can be achieved, with potential applications to multi-state optical information encoding. The approach demonstrated here can be generalized to other polarization-controlled devices for wavefront shaping, such as switchable lenses, beam-splitters, and holographic elements.
National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, College of Engineering and Applied Sciences, Nanjing University（南京大学工程与应用科学学院）；Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University（南洋理工大学物理与数学学院）；School of Electrical and Electronic Engineering, Nanyang Technological University（南洋理工大学电气与电子工程学院）
