Open AccessFormation of polarization-dependent optical vortex beams via an engineered microsphere
Author(s) -
Yiyin Zhou,
Minghui Hong
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.422542
Subject(s) - polarizer , optics , polarization (electrochemistry) , light beam , optical vortex , materials science , radial polarization , microsphere , ray , linear polarization , transverse plane , circular polarization , beam (structure) , physics , laser beams , laser , birefringence , laser beam quality , chemistry , structural engineering , chemical engineering , engineering , microstrip
In this work, we propose a method that can realize switchable spatial arrangement of the donut-shaped focusing beams through an engineered microsphere, tuned by changing the polarization state of an incident light. In this polarization-dependent light manipulation, the engineered microsphere is designed and fabricated by focused ion beam (FIB). We simulate and experimentally characterize the focus performance of the engineered microsphere. Under the light incidence with radial polarization, multiple focused donut beams are formed along optical axis. By adding an additional linear polarizer with a rotatable relative angle, the pair of donut beams can be re-arranged in the same transverse plane and stay close to each other. Experimental results and numerical simulation are in good agreement. Such tunable polarization-dependent micro-optics can be used for multiplane imaging applications.