Tailoring multi-singularity structure induced by a focused radially polarized beam

Chen, Y., Wang, J. , Peng, Z., Wang, M., Wang, H., Wei, D., Gao, H. and Li, F. (2021) Tailoring multi-singularity structure induced by a focused radially polarized beam. Journal of the Optical Society of America A: Optics Image Science and Vision, 38(3), pp. 419-425. (doi: 10.1364/JOSAA.415551) (PMID:33690473)

Abstract

A structured optical field with controllable three-dimensional intensity and multiple polarization singularities is demonstrated by utilizing a combination of a radially polarized (RP) beam, a designed phase mask, and a high numerical aperture lens. Owing to the tight focusing property of RP beams as well as the interference of multiple linearly polarized non-coplanar plane waves, various lattice-like optical structures can emerge at the focal plane with multiple structured singularities in the transverse plane and optical needle array along with propagation. Compared with recently proposed phase and polarization engineering methods with spatial light modulators, the method presented here is convenient and flexible, and can easily realize the generation of V-point and C-point lattices. More importantly, a structured longitudinal field, namely, an optical needle array, with steerable positive and reverse energy flows may be extensively applied in multi-particle acceleration and trapping, optical microscopes, and second-harmonic generation.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wang, Jinwen
• Authors: Chen, Y., Wang, J., Peng, Z., Wang, M., Wang, H., Wei, D., Gao, H., and Li, F.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Journal of the Optical Society of America A: Optics Image Science and Vision
• Publisher: Optical Society of America
• ISSN: 1084-7529
• ISSN (Online): 1520-8532
• Published Online: 27 January 2021