Chinese Optics Letters, 2018, 16 (6): 062301, Published Online: Jul. 2, 2018  

Micro-patterned liquid crystal Pancharatnam–Berry axilens Download: 770次

Author Affiliations
1 Physics Department, East China University of Science and Technology, Shanghai 200237, China
2 ECE Department, Hong Kong University of Science and Technology, Hong Kong 999077, China
3 College of Information Science and Technology, Donghua University, Shanghai 201620, China
4 E-mail: amwtam@ust.hk
Abstract
A liquid crystal Pancharatnam–Berry (PB) axilens is proposed and fabricated via a digital micro-mirror-device-based photo-patterning system. The polarization-dependent device behaves as an axilens for a left-handed circularly polarized incident beam, for which an optical ring is focused with a long focal depth in the transverse direction at the output, and an anti-axilens for a right-handed circularly polarized incident beam, for which an optical ring gradually expands at the output. The modification of the size and the sharpness of the diffracted ring beam is demonstrated by encoding a positive (negative) PB lens term into the director expression of a PB (anti-)axicon.

Jiarui Ren, Weichang Wang, Weiqiang Yang, Conglong Yuan, Kang Zhou, Xiao Li, Alwin Mingwai Tam, Cuiling Meng, Jiatong Sun, Vladimir G. Chigrinov, Hoising Kwok, Xiaoqian Wang, Zhigang Zheng, Dong Shen. Micro-patterned liquid crystal Pancharatnam–Berry axilens[J]. Chinese Optics Letters, 2018, 16(6): 062301.

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