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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Offset-apertured near-field scanning optical microscope probes

M. C. Quong and A. Y. Elezzabi  »View Author Affiliations


Optics Express, Vol. 15, Issue 16, pp. 10163-10174 (2007)
http://dx.doi.org/10.1364/OE.15.010163


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Abstract

Near-field scanning optical microscope (NSOM) probe designs consisting of a subwavelength aperture offset of either a metallic or metal-coated dielectric cantilevered tip are investigated using finite-difference time-domain calculations. The offset aperture and metal-coated dielectric tip couple surface plasmons that illuminate the tip apex, which results in a single-lobed probing optical spot having a full-width half maximum (FWHM) similar to the apex diameter. Since the surface plasmons converge at the apex, an offset-apertured probe promises significantly higher throughput light intensities than an apertured NSOM having a comparable spot FWHM.

© 2007 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(180.5810) Microscopy : Scanning microscopy
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Microscopy

History
Original Manuscript: April 18, 2007
Revised Manuscript: July 3, 2007
Manuscript Accepted: July 6, 2007
Published: July 27, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
M. C. Quong and A. Y. Elezzabi, "Offset-apertured near-field scanning optical microscope probes," Opt. Express 15, 10163-10174 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-15-16-10163


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