Photonics Research, 2016, 4 (5): 05000B35, Published Online: Nov. 23, 2016
Creation of radially polarized optical fields with multiple controllable parameters using a vectorial optical field generator Download: 1050次
Polarization Polarization Spatial light modulators Spatial light modulators Laser beam shaping Laser beam shaping Diffractive optics Diffractive optics
Abstract
A vectorial optical field generator (VOF-Gen) based on two reflective phase-only liquid crystal spatial light modulators enables the creation of an arbitrary optical complex field. In this work, the capabilities of the VOF-Gen in terms of manipulating the spatial distributions of phase, amplitude, and polarization are experimentally demonstrated by generating a radially polarized optical field consisted of five annular rings, the focusing properties of which are also numerically studied with vectorial diffraction theory. By carefully adjusting the relative amplitude and phase between the adjacent rings, an optical needle field with purely longitudinal polarization can be produced in the focal region of a high numerical aperture lens. The versatile method presented in this work can be easily extended to the generation of a vectorial optical field with any desired complex distributions.
Sichao Zhou, Shiyi Wang, Jian Chen, Guanghao Rui, Qiwen Zhan. Creation of radially polarized optical fields with multiple controllable parameters using a vectorial optical field generator[J]. Photonics Research, 2016, 4(5): 05000B35.