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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 25 — Sep. 1, 2012
  • pp: 6038–6044

Design, fabrication, and evaluation of a multilevel spiral-phase Fresnel zone plate for optical trapping

A. Vijayakumar and Shanti Bhattacharya  »View Author Affiliations


Applied Optics, Vol. 51, Issue 25, pp. 6038-6044 (2012)
http://dx.doi.org/10.1364/AO.51.006038


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Abstract

A compact optics configuration for the generation of donut beams for trapping atoms at the micrometer scale using a multilevel spiral-phase Fresnel zone plate (FZP) and a semiconductor laser is proposed. A FZP is designed and a multilevel spiral phase is integrated into it. A spiral-phase FZP with a radius of 1 mm and with more than 1300 half-period zones is designed with multiple angular levels for integer and fractional topological charges, and the device is fabricated using electron-beam lithography direct writing. The performance of the device is evaluated, and the generation of symmetric and asymmetric donut beams is successfully demonstrated.

© 2012 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(050.1965) Diffraction and gratings : Diffractive lenses
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: May 15, 2012
Revised Manuscript: July 13, 2012
Manuscript Accepted: July 17, 2012
Published: August 24, 2012

Citation
A. Vijayakumar and Shanti Bhattacharya, "Design, fabrication, and evaluation of a multilevel spiral-phase Fresnel zone plate for optical trapping," Appl. Opt. 51, 6038-6044 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-25-6038

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