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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 13 — Jul. 1, 2013
  • pp: 15090–15101

Vectorial design of super-oscillatory lens

Tao Liu, Jiubin Tan, Jian Liu, and Hongting Wang  »View Author Affiliations


Optics Express, Vol. 21, Issue 13, pp. 15090-15101 (2013)
http://dx.doi.org/10.1364/OE.21.015090


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Abstract

A design and optimization method based on vectorial angular spectrum theory is proposed in this paper for the vectorial design of a super-oscillatory lens (SOL), so that the radially polarized vector beam can be tightly focused. The structure of a SOL is optimized using genetic algorithm and the computational process is accelerated using fast Hankel transform algorithm. The optimized results agree well with what is obtained using the vectorial Rayleigh-Sommerfeld diffraction integral. For an oil immersed SOL, a subwavelength focal spot of about 0.25 illumination wavelength without any significant side lobe can be created at a distance of 184.86μm away from a large SOL with a diameter of 1mm. The proposed vectorial design method can be used to efficiently design a SOL of arbitrary size illuminated by various vector beams, with the subwavelength hotspot located in a post-evanescent observation plane.

© 2013 OSA

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1940) Diffraction and gratings : Diffraction
(100.6640) Image processing : Superresolution
(260.5430) Physical optics : Polarization
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 19, 2013
Revised Manuscript: May 21, 2013
Manuscript Accepted: May 28, 2013
Published: June 17, 2013

Virtual Issues
Vol. 8, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Tao Liu, Jiubin Tan, Jian Liu, and Hongting Wang, "Vectorial design of super-oscillatory lens," Opt. Express 21, 15090-15101 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-13-15090


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