Open AccessDeterministic approach to the generation of modified helical beams for optical manipulation
Author(s) -
Jiao Lin,
Xiaocong Yuan,
Shaohua Tao,
Xiang Peng,
Hanben Niu
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.003862
Subject(s) - optics , optical vortex , spatial light modulator , wavefront , physics , core (optical fiber) , light beam , beam (structure) , angular momentum , optical tweezers , phase (matter) , vortex , quantum mechanics , thermodynamics
We present a deterministic method to generate modified helical beams which create optical vortices with desired dark core intensity patterns in the far-field. The experiments are implemented and verified by a spatial light modulator (SLM), which imprints a phase function onto the incident wavefront of a TEM00 laser mode to transform the incident beam into a modified helical beam. The phase function can be calculated once a specific dark core shape of an optical vortex is required. The modified helical beam is exploited in optical manipulation with verification of its orbital angular momentum experimentally.