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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 12698–12705

Surface enhanced Raman imaging: periodic arrays and individual metal nanoparticles

Jonas Beermann, Sergey M. Novikov, Kristjan Leosson, and Sergey I. Bozhevolnyi  »View Author Affiliations


Optics Express, Vol. 17, Issue 15, pp. 12698-12705 (2009)
http://dx.doi.org/10.1364/OE.17.012698


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Abstract

Surface enhanced Raman scattering (SERS) from Rhodamine 6G homogenously adsorbed on both periodic arrays of and individual gold nanoparticles is investigated using high-resolution Raman imaging with polarized excitation. Rectangular 50-nm-high nanoparticles of different sizes chosen to ensure the presence of localized surface plasmon resonances close to the 532-nm excitation wavelength are fabricated with electron-beam lithography on the surface of a smooth gold film and arranged both individually (i.e., placed sufficiently far apart) and in 740-nm-period arrays. Linear reflection spectra and high-resolution Raman images obtained from arrays of nanoparticles are compared revealing good correspondence in the spectral dependences of reflection and local SERS enhancements (measured at the top of nanoparticles). The latter are related to those observed with individual nanoparticles. The results obtained emphasize the importance and quantify the influence of particle dimensions, polarized excitation, collective resonances and SERS locations.

© 2009 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(180.5655) Microscopy : Raman microscopy
(310.6628) Thin films : Subwavelength structures, nanostructures
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: June 8, 2009
Manuscript Accepted: June 24, 2009
Published: July 10, 2009

Citation
Jonas Beermann, Sergey M. Novikov, Kristjan Leosson, and Sergey I. Bozhevolnyi, "Surface enhanced Raman imaging: periodic arrays and individual metal nanoparticles," Opt. Express 17, 12698-12705 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-15-12698


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