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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 10 — Nov. 8, 2013

Femtosecond double-pulse fabrication of hierarchical nanostructures based on electron dynamics control for high surface-enhanced Raman scattering

Ning Zhang, Xin Li, Lan Jiang, Xuesong Shi, Cong Li, and Yongfeng Lu  »View Author Affiliations

Optics Letters, Vol. 38, Issue 18, pp. 3558-3561 (2013)

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This Letter presents a simple, efficient approach for high surface-enhanced Raman scattering by one-step controllable fabrication of hierarchical structures (nanoparticles+subwavelength ripples) on silicon substrates in silver nitrate solutions using femtosecond double pulses based on nanoscale electron dynamics control. As the delays of the double pulses increase from 0 fs to 1 ps, the hierarchical structures can be controlled with (1) nanoparticles—the number of nanoparticles in the range of 40–100 nm reaches the maximum at 800 fs and (2) ripples—the subwavelength ripples become intermittent with decreased ablation depths. The redistributed nanoparticles and the modified ripple structures contribute to the maximum enhancement factor of 2.2×108 (measured by 106M rhodamine 6G solution) at the pulse delay of 800 fs.

© 2013 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

Original Manuscript: July 5, 2013
Manuscript Accepted: August 8, 2013
Published: September 6, 2013

Virtual Issues
Vol. 8, Iss. 10 Virtual Journal for Biomedical Optics

Ning Zhang, Xin Li, Lan Jiang, Xuesong Shi, Cong Li, and Yongfeng Lu, "Femtosecond double-pulse fabrication of hierarchical nanostructures based on electron dynamics control for high surface-enhanced Raman scattering," Opt. Lett. 38, 3558-3561 (2013)

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