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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3648–3650

Two-step femtosecond laser pulse train fabrication of nanostructured substrates for highly surface-enhanced Raman scattering

Lan Jiang, Dawei Ying, Xin Li, and Yongfeng Lu  »View Author Affiliations


Optics Letters, Vol. 37, Issue 17, pp. 3648-3650 (2012)
http://dx.doi.org/10.1364/OL.37.003648


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Abstract

A simple and repeatable method using femtosecond laser pulse train to fabricate nanostructured substrates with silver nanoparticles over a large area for surface-enhanced Raman scattering is reported. The method involves two steps: (1) femtosecond laser pulse train micromachining and roughening and (2) femtosecond laser processing of the substrates in a silver nitrate solution. Surface modification is investigated experimentally by varying the time delay of the double femtosecond laser pulse train. With time delay ranging from 200 to 600 fs, the different enhancement factors were observed. This study demonstrates that a maximum enhancement factor of 6.8×106, measured by 106M Rhodamine 6G solution, can be achieved at the time delay of 400 fs.

© 2012 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(300.6450) Spectroscopy : Spectroscopy, Raman
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 20, 2012
Revised Manuscript: July 19, 2012
Manuscript Accepted: July 28, 2012
Published: August 28, 2012

Citation
Lan Jiang, Dawei Ying, Xin Li, and Yongfeng Lu, "Two-step femtosecond laser pulse train fabrication of nanostructured substrates for highly surface-enhanced Raman scattering," Opt. Lett. 37, 3648-3650 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-17-3648


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