16 September 2016 Generation of optimal annular vortex beams for orbital angular momentum transfer to microparticles
Author Affiliations +
Abstract
In this work, we show the conversion of a Gaussian beam into an annular vortex beam (AVB) by means of an optical vortex element (OVE). This is a simple phase plate which generates the AVB at a determined distance without the use of external optical elements such as lenses and axicons. We discuss the interesting features and the advantages of the OVE respect to other methods to generate AVB such as the conventional vortex (CV) and the helical axicon (HA). The OVE presents the highest intensity peak respect to both the CV and the HA. Another important feature is that the OVE and the HA maintain a fixed annular radius; in contrast the CV changes the annular radius, while the topological charge is modified. The OVE is displayed on a spatial light modulator (SLM) in order to generate experimentally the AVBs. We demonstrate the features of the AVB generated and measure the high angular velocities achieved due to the angular momentum transfer to 3 μm particles.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
U. Ruiz, U. Ruiz, Rafael Paez, Rafael Paez, V. Arrizon, V. Arrizon, R. Ramos, R. Ramos, } "Generation of optimal annular vortex beams for orbital angular momentum transfer to microparticles", Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99220N (16 September 2016); doi: 10.1117/12.2239046; https://doi.org/10.1117/12.2239046
PROCEEDINGS
6 PAGES + PRESENTATION

SHARE
Back to Top