Papers & References

Experimental verification of focus tailoring using circularly polarized vortex beams with annular pupil mask

PLUTO / PLUTO-2 Spatial Light Modulators
Higher Order Modes / Optical Vortex / OAM Polarization Generation
Published on:
Authors: Yang, Shuangyang; Powers, Peter E.; Zhan, Qiwen
Abstract:

The focusing properties of circularly polarized vortex beam are experimentally verified by examining two-photon fluorescent emission patterns inside an 8µm fluorescent microsphere. Very good agreements between the experimental and theoretical results have been obtained. Annular pupil masks are used to tailor the profile at the focus. When an LG 0 1 circularly polarized beam with the appropriate handedness is used in combination with an annular pupil aperture, a strong longitudinal component is observed, which results in a raised center and a smaller focal spot. This interesting focusing property can be utilized in applications that require a distinct longitudinal component.

Restricted Access

Publication: Optics Communications
Issue/Year: Volume 282, Issue 24, 15 December 2009, Pages 4657-4659
DOI: 10.1016/j.optcom.2009.09.018
Link: https://doi.org/10.1016/j.optcom.2009.09.018
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