Atomic optical spatial mode extractor for vector beams based on polarization-dependent absorption  

作　　者：常虹 杨欣 王金文 马燕 杨鑫琪 曹明涛 张晓斐 高宏 董瑞芳 张首刚 Hong Chang;Xin Yang;Jinwen Wang;Yan Ma;Xinqi Yang;Mingtao Cao;Xiaofei Zhang;Hong Gao;Ruifang Dong;Shougang Zhang(Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi'an,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijig 100049,China;Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices,School of Physics,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi'an,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijig 100049,China [3]Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices,School of Physics,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Physics B》2023年第3期14-18,共5页中国物理B（英文版）

摘　　要：Vector beams with spiral phase and spatially varying polarization profiles have many applications from optical micromanipulation to materials processing. Here, we propose and demonstrate an atomic spatial mode extracting scheme for the vector beam based on polarization-dependent absorption in the atom vapor. By employing the linear polarization pump beam which induces polarization sensitive absorption in the atomic ensemble, a counter-propagated weak probe vector beam is extracted by spatial absorption, and extracted part still maintains the original polarization and the vortex phase.The topological charges of the extracted mode are verified by interfering with the Gaussian beam, and it can be found that the orbital angular momentum is conserved in the extracting process. Our work will have potential applications in non-destructive spatial mode identification, and is also useful for studying higher-dimensional quantum information based on atomic ensembles.

关 键 词：vector beam polarization-dependent absorption optical pumping 

分 类 号：O43[机械工程—光学工程]