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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. 1 — Jan. 1, 2012
  • pp: 185–190

Characterization of localized field enhancements in laser fabricated gold needle nanostructures

Sergey M. Novikov, Andrey B. Evlyukhin, Arseniy I. Kuznetsov, Jonas Beermann, Boris N. Chichkov, and Sergey I. Bozhevolnyi  »View Author Affiliations


JOSA B, Vol. 29, Issue 1, pp. 185-190 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000185


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Abstract

Field intensity enhancements (FEs) produced by gold needle nanostructures, namely, standing upright sharp and sphere-terminated needles, fabricated on a gold substrate by femtosecond laser irradiation, are investigated and characterized using linear reflection spectroscopy, two-photon photoluminescence (TPL) scanning optical microscopy, and high-resolution confocal Raman microscopy. Surface enhanced Raman scattering (SERS) is observed using linearly polarized 532 nm excitation of Rhodamine 6G homogeneously adsorbed on the structures. The obtained high-resolution TPL and Raman images both indicate a relatively high FE level of 75 for the fabricated structures. We believe that the observed FE levels along with the special topography make these upright elongated structures particularly promising for SERS experiments with living cells.

© 2012 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(190.0190) Nonlinear optics : Nonlinear optics
(240.6680) Optics at surfaces : Surface plasmons
(290.0290) Scattering : Scattering
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: August 2, 2011
Revised Manuscript: October 12, 2011
Manuscript Accepted: November 1, 2011
Published: December 22, 2011

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Sergey M. Novikov, Andrey B. Evlyukhin, Arseniy I. Kuznetsov, Jonas Beermann, Boris N. Chichkov, and Sergey I. Bozhevolnyi, "Characterization of localized field enhancements in laser fabricated gold needle nanostructures," J. Opt. Soc. Am. B 29, 185-190 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-1-185


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