Tightly focused optical field with controllable photonic spin orientation

Discontinued Devices LC-R 1080 Spatial Light Modulators
Complex Modulation
Published on:
Authors: Jian Chen and Chenhao Wan and Ling Jiang Kong and Qiwen Zhan
Abstract:
“The spin angular momentum of photons offers a robust, scalable and highbandwidth toolbox for many promising applications based upon spin-controlled manipulations of light. In this work, we develop a method to achieve controllable photonic spin orientation within a diffraction limited optical focal spot produced by a high numerical aperture objective lens. The required pupil field is found analytically through reversing the radiation patterns from two electric dipoles located at the focal point of the lens with orthogonal oscillation directions and quadrature phase. The calculated pupil fields are experimentally generated with a vectorial optical field generator. The produced photonic spin orientations are quantitatively evaluated by their spin densities according to the tightly focused electric fields calculated by Richard-Wolf vectorial diffraction theory to demonstrate the validity and capability of the proposed technique.”

Open Access

Publication: Optics Express
Issue/Year: Optics Express, Volume 25, Number 16 pp. 19517-19528 (2017)
DOI: 10.1364/OE.25.019517
Link: https://doi.org/10.1364/OE.25.019517

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