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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 4 — Feb. 1, 2006
  • pp: 633–638

Backscattering enhancement of light by nanoparticles positioned in localized optical intensity peaks

Zhigang Chen, Xu Li, Allen Taflove, and Vadim Backman  »View Author Affiliations


Applied Optics, Vol. 45, Issue 4, pp. 633-638 (2006)
http://dx.doi.org/10.1364/AO.45.000633


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Abstract

We report what we believe to be a novel backscattering phenomenon associated with localized optical intensity peaks (spanning as little as 43 ‚ÄČ nm ) arising at the shadow-side surfaces of plane-wave-illuminated dielectric microcylinders of noncircular cross sections. Namely, for nanometer-scale dielectric particles positioned within the localized intensity peaks, their backscattering of visible light is enhanced by several orders of magnitude relative to the case of isolated nanoparticles (i.e., Rayleigh scattering). The positions of the localized intensity peaks can be quickly scanned along the microcylinder surface by changing either the incident wavelength or angle. This combination of giant backscattering enhancement of nanoparticles and ease and rapidity of scanning may present advantages relative to the use of fragile, mechanically scanned, near-field probes. Potential applications include visible-light detection, characterization, and manipulation of nanoparticles.

© 2006 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(290.1350) Scattering : Backscattering
(290.5850) Scattering : Scattering, particles
(290.5870) Scattering : Scattering, Rayleigh

ToC Category:
Scattering

History
Original Manuscript: May 23, 2005
Revised Manuscript: August 3, 2005
Manuscript Accepted: August 5, 2005

Virtual Issues
Vol. 1, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Zhigang Chen, Xu Li, Allen Taflove, and Vadim Backman, "Backscattering enhancement of light by nanoparticles positioned in localized optical intensity peaks," Appl. Opt. 45, 633-638 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-4-633

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