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Optics Letters

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  • Vol. 36, Iss. 17 — Sep. 1, 2011
  • pp: 3353–3355

Femtosecond and nanosecond laser fabricated substrate for surface-enhanced Raman scattering

Adam Hamdorf, Matthew Olson, Cheng-Hsiang Lin, Lan Jiang, Jun Zhou, Hai Xiao, and Hai-Lung Tsai  »View Author Affiliations


Optics Letters, Vol. 36, Issue 17, pp. 3353-3355 (2011)
http://dx.doi.org/10.1364/OL.36.003353


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Abstract

We report a simple and repeatable method for fabricating a large-area substrate for surface-enhanced Raman scattering. The substrate was processed by three steps: (i) femtosecond (fs) laser micromachining and roughening, (ii) thin-film coating, and (iii) nanosecond laser heating and melting. Numerous gold nanoparticles of various sizes were created on the surface of the silicon substrate. The 3D micro-/nanostructures generated by the fs laser provide greater surface areas with more nanoparticles leading to 2 orders of magnitude higher of the enhancement factor than in the case of a flat substrate. Using an He–Ne laser with a 632.8 nm excitation wavelength, the surface-enhanced Raman scattering enhancement factor for Rhodamine 6G was measured up to 2 × 10 7 .

© 2011 Optical Society of America

OCIS Codes
(300.6450) Spectroscopy : Spectroscopy, Raman
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Spectroscopy

History
Original Manuscript: May 31, 2011
Revised Manuscript: July 15, 2011
Manuscript Accepted: July 15, 2011
Published: August 22, 2011

Citation
Adam Hamdorf, Matthew Olson, Cheng-Hsiang Lin, Lan Jiang, Jun Zhou, Hai Xiao, and Hai-Lung Tsai, "Femtosecond and nanosecond laser fabricated substrate for surface-enhanced Raman scattering," Opt. Lett. 36, 3353-3355 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-17-3353


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