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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 6 — Mar. 25, 2013
  • pp: 7577–7582

Sub-wavelength focusing meta-lens

Tapashree Roy, Edward T. F. Rogers, and Nikolay I. Zheludev  »View Author Affiliations


Optics Express, Vol. 21, Issue 6, pp. 7577-7582 (2013)
http://dx.doi.org/10.1364/OE.21.007577


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Abstract

We show that a planar plasmonic metamaterial with spatially variable meta-atom parameters can focus transmitted light into sub-wavelength hot-spots located beyond the near-field of the metamaterial. By nano-structuring a gold film we created an array of meta-lenses generating foci of 160 nm (0.2λ) in diameter when illuminated by a wavelength of 800 nm. We attribute the occurrence of sub-wavelength hotspots beyond the near field to the phenomenon of superoscillation.

© 2013 OSA

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(160.3918) Materials : Metamaterials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Metamaterials

History
Original Manuscript: January 30, 2013
Manuscript Accepted: March 4, 2013
Published: March 19, 2013

Citation
Tapashree Roy, Edward T. F. Rogers, and Nikolay I. Zheludev, "Sub-wavelength focusing meta-lens," Opt. Express 21, 7577-7582 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-6-7577


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