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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 3 — Mar. 1, 2014
  • pp: 500–504

Creation of a 50,000λ long needle-like field with 0.36λ width

Minning Zhu, Qing Cao, and Hua Gao  »View Author Affiliations


JOSA A, Vol. 31, Issue 3, pp. 500-504 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000500


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Abstract

It is a great challenge to create a needle-like field with properties of long beam length, narrow lateral width, uniformity, and high optical efficiency. Here we show a method that can realize these properties all at once. The key element is a 90° apex-angle concave conical mirror. By using this condenser along with a radially polarized incident beam of a specific field distribution, we numerically created a super slim, uniform, pure needle-like axially polarized field. This axially polarized field has a length of 50,000λ along the optical axis, and its lateral width still maintains a minimum 0.36λ size.

© 2014 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(050.1970) Diffraction and gratings : Diffractive optics
(080.2740) Geometric optics : Geometric optical design
(220.1770) Optical design and fabrication : Concentrators
(230.4040) Optical devices : Mirrors

ToC Category:
Optical Devices

History
Original Manuscript: November 8, 2013
Revised Manuscript: January 6, 2014
Manuscript Accepted: January 6, 2014
Published: February 5, 2014

Citation
Minning Zhu, Qing Cao, and Hua Gao, "Creation of a 50,000λ long needle-like field with 0.36λ width," J. Opt. Soc. Am. A 31, 500-504 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-3-500

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