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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 31 — Nov. 1, 2011
  • pp: G27–G30

Subwavelength focusing using a hyperbolic medium with a single slit

Guixin Li, Jensen Li, and Kok Wai Cheah  »View Author Affiliations


Applied Optics, Vol. 50, Issue 31, pp. G27-G30 (2011)
http://dx.doi.org/10.1364/AO.50.000G27


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Abstract

A hyperbolic dispersion medium with a planar surface that can be used for subwavelength focusing is proposed. By combining the hyperbolic medium in a single slit with diffraction limit width, a laser beam could be focused to a subwavelength spot in the near field. Compared to a conventional superlens, the subdiffraction focusing in this work has higher optical throughput. Using a planar hyperbolic medium, which is actually alternating silver/dielectric multilayers, we showed that the focusing resolution of the designed device is down to λ / 5 using green light illumination (at a wavelength of 514.5 nm ).

© 2011 Optical Society of America

OCIS Codes
(260.2110) Physical optics : Electromagnetic optics
(350.3618) Other areas of optics : Left-handed materials
(310.6628) Thin films : Subwavelength structures, nanostructures

History
Original Manuscript: May 12, 2011
Revised Manuscript: August 10, 2011
Manuscript Accepted: August 10, 2011
Published: September 21, 2011

Citation
Guixin Li, Jensen Li, and Kok Wai Cheah, "Subwavelength focusing using a hyperbolic medium with a single slit," Appl. Opt. 50, G27-G30 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-31-G27

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