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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 14635–14644

Probing dielectric interfaces on the nanoscale with elastic scattering patterns of single gold nanorods

Tina Züchner, Antonio Virgilio Failla, Mathias Steiner, and Alfred J. Meixner  »View Author Affiliations


Optics Express, Vol. 16, Issue 19, pp. 14635-14644 (2008)
http://dx.doi.org/10.1364/OE.16.014635


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Abstract

We study spatially isolated, individual gold nanorods placed at a planar interface between two dielectric media using confocal interference scattering microscopy in combination with higher order laser modes. Approaching refractive index matching conditions, we observe that the elastic scattering patterns of individual nanorods exhibit an exponential increase of both the scattering intensity and the signal-to-background ratio. In case refractive index matching conditions are fullfilled, the data acquisition rates are maximized and suitable for in-vivo biological measurements. In all cases, the characteristic two-lobe shape of the scattering patterns of single nanorods remains unchanged while the sign of the image contrast is a direct consequence of the refractive index variation occurring at the interface.

© 2008 Optical Society of America

OCIS Codes
(180.0180) Microscopy : Microscopy
(180.1790) Microscopy : Confocal microscopy
(180.3170) Microscopy : Interference microscopy
(290.5850) Scattering : Scattering, particles

ToC Category:
Microscopy

History
Original Manuscript: June 10, 2008
Revised Manuscript: July 24, 2008
Manuscript Accepted: July 24, 2008
Published: September 3, 2008

Virtual Issues
Vol. 3, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Tina Züchner, Antonio Virgilio Failla, Mathias Steiner, and Alfred J. Meixner, "Probing dielectric interfaces on the nanoscale with elastic scattering patterns of single gold nanorods," Opt. Express 16, 14635-14644 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-19-14635


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