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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 5 — May. 1, 2012
  • pp: 1119–1124

Enabling two-dimensional optical subdiffraction imaging at an extended working distance: a planar antenna-array approach

Yan Wang, Amr S. Helmy, and George V. Eleftheriades  »View Author Affiliations


JOSA B, Vol. 29, Issue 5, pp. 1119-1124 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001119


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Abstract

We propose a practical optical probe configuration capable of two-dimensional subdiffraction imaging beyond the conventionally used near-field range. The probe consists of a planar array of plasmonic monopoles radiating with different amplitudes and phases, such that the near-field interaction of the array elements produces a subdiffraction spot size 40% smaller than the diffraction limit at a quarter-wavelength away from the probe. Although designed to operate in the visible, this topology is scalable to other spectra as well. Our proposed configuration could alleviate the “working distance” issue between the object and imaging apparatus since it enables superresolution focusing at relatively long distances while being compatible with existing near-field imaging setups, such as scanning near-field optical microscopes.

© 2012 Optical Society of America

OCIS Codes
(180.4243) Microscopy : Near-field microscopy
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Thin Films

History
Original Manuscript: January 12, 2012
Revised Manuscript: February 28, 2012
Manuscript Accepted: February 28, 2012
Published: April 30, 2012

Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Yan Wang, Amr S. Helmy, and George V. Eleftheriades, "Enabling two-dimensional optical subdiffraction imaging at an extended working distance: a planar antenna-array approach," J. Opt. Soc. Am. B 29, 1119-1124 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-5-1119


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References

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