Generation and control of dynamically tunable circular Pearcey beams with annular spiral-zone phase  

作　　者：KaiHui Chen HuiXin Qiu You Wu ZeJia Lin HaiQi Huang LingLing Shui DongMei Deng HongZhan Liu ZhiGang Chen 

机构地区：[1]Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices,South China Normal University,Guangzhou 510631,China [2]School of Information and Optoelectronic Science and Engineering,South China Normal University,Guangzhou 510006,China [3]MOE Key Laboratory of Weak-Light Nonlinear Photonics,TEDA Applied Physics Institute and School of Physics,Nankai University,Tianjin 300457,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2021年第10期72-81,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11775083, and 11374108);the Science and Technology Program of Guangzhou (Grant No. 2019050001);the National Key R&D Program of China (Grant No. 2017YFA0303800);the Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (Grant No. pdjh2020a0149)。

摘　　要：Light-field shaping technology plays an important role in optics and nanophotonics. For instance, the spatially structured light field, which exhibits characteristic features in complex phases, light intensity, and polarization, is crucial to understanding new physical phenomena and exploring practical applications. Herein, we propose and demonstrate a new class of tunable circular Pearcey beams(TCPBs) by imposing the annular spiral-zone phase(ASZP). Through experiments, we used a spatial light modulator to generate TCPBs based on their spiral phase distribution, and numerically analyzed the generation and control of the beams with unusual autofocusing and self-rotating dynamics. ASZP is a general term for complex phases composed of the spiral phase,equiphase, and radial phase. TCPB typically exhibits dynamical properties, including abrupt autofocusing, automatic generation of optical bottles, and self-rotation of the beam pattern, during propagation. Besides, the number of generated optical bottles can be modulated by the superposition mode of ASZP and the number of subphases. We found that an inappropriate superposition mode leads to distortion, and we analyzed the underlying mechanism. Potential applications of TCPBs in optical manipulation are also discussed, presenting an exemplary role desired for light-field manipulation.

关 键 词：annular spiral-zone phases abruptly autofocusing beams optical bottles 

分 类 号：O43[机械工程—光学工程]