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

Adam Hamdorf, Matthew Olson, Cheng Hsiang Lin, Lan Jiang, Jun Zhou, Hai Xiao, Hai Lung Tsai

Research output: Contribution to journalArticle

18 Scopus citations

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 632.8nm excitation wavelength, the surfaceenhanced Raman scattering enhancement factor for Rhodamine 6G was measured up to 2 × 107.

Original languageEnglish (US)
Pages (from-to)3353-3355
Number of pages3
JournalOptics Letters
Volume36
Issue number17
DOIs
StatePublished - Sep 1 2011

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Hamdorf, A., Olson, M., Lin, C. H., Jiang, L., Zhou, J., Xiao, H., & Tsai, H. L. (2011). Femtosecond and nanosecond laser fabricated substrate for surface-enhanced Raman scattering. Optics Letters, 36(17), 3353-3355. https://doi.org/10.1364/OL.36.003353