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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. 1 — Jan. 19, 2007

Vectorial modeling of near-field imaging with uncoated fiber probes: transfer function and resolving power

Niels Gregersen, Bjarne Tromborg, and Sergey I. Bozhevolnyi  »View Author Affiliations


Applied Optics, Vol. 45, Issue 34, pp. 8739-8747 (2006)
http://dx.doi.org/10.1364/AO.45.008739


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Abstract

Using exact 3D vectorial simulations of radiation coupling into uncoated dielectric fiber probes, we calculate amplitude transfer functions for conical single-mode fiber tips at the light wavelength of 633   nm . The coupling efficiency of glass fiber tips is determined in a wide range of spatial frequencies of the incident radiation for opening angles varying from 30° to 120°. The resolution in near-field imaging with these tips is considered for field distributions limited in both direct and spatial-frequency space. The characteristics of the transfer functions describing the relation between probed optical fields and near-field images are analyzed in detail. The importance of utilizing a perfectly sharp tip is also examined.

© 2006 Optical Society of America

OCIS Codes
(110.2990) Imaging systems : Image formation theory
(110.4850) Imaging systems : Optical transfer functions
(180.5810) Microscopy : Scanning microscopy

ToC Category:
Imaging Systems

History
Original Manuscript: March 1, 2006
Revised Manuscript: July 14, 2006
Manuscript Accepted: July 24, 2006

Virtual Issues
Vol. 2, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Niels Gregersen, Bjarne Tromborg, and Sergey I. Bozhevolnyi, "Vectorial modeling of near-field imaging with uncoated fiber probes: transfer function and resolving power," Appl. Opt. 45, 8739-8747 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-45-34-8739

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