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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26056–26064

Large-area plasmonic hot-spot arrays: sub-2 nm interparticle separations with plasma-enhanced atomic layer deposition of Ag on periodic arrays of Si nanopillars

Joshua D. Caldwell, Orest J. Glembocki, Francisco J. Bezares, Maarit I. Kariniemi, Jaakko T. Niinistö, Timo T. Hatanpää, Ronald W. Rendell, Maraizu Ukaegbu, Mikko K. Ritala, Sharka M. Prokes, Charles M. Hosten, Markku A. Leskelä, and Richard Kasica  »View Author Affiliations

Optics Express, Vol. 19, Issue 27, pp. 26056-26064 (2011)

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Initial reports of plasmonic ‘hot-spots’ enabled the detection of single molecules via surface-enhanced Raman scattering (SERS) from random distributions of plasmonic nanoparticles. Investigations of systems with near-field plasmonically coupled nanoparticles began, however, the ability to fabricate reproducible arrays of such particles has been lacking. We report on the fabrication of large-area, periodic arrays of plasmonic 'hot-spots' using Ag atomic layer deposition to overcoat Si nanopillar templates leading to reproducible interpillar gaps down to <2 nm. These plasmonic 'hot-spots' arrays exhibited over an order of magnitude increase in the SERS response in comparison to similar arrays with larger interpillar separations.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.3918) Materials : Metamaterials
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

Original Manuscript: September 30, 2011
Revised Manuscript: November 12, 2011
Manuscript Accepted: November 19, 2011
Published: December 7, 2011

Virtual Issues
Vol. 7, Iss. 2 Virtual Journal for Biomedical Optics
March 7, 2012 Spotlight on Optics

Joshua D. Caldwell, Orest J. Glembocki, Francisco J. Bezares, Maarit I. Kariniemi, Jaakko T. Niinistö, Timo T. Hatanpää, Ronald W. Rendell, Maraizu Ukaegbu, Mikko K. Ritala, Sharka M. Prokes, Charles M. Hosten, Markku A. Leskelä, and Richard Kasica, "Large-area plasmonic hot-spot arrays: sub-2 nm interparticle separations with plasma-enhanced atomic layer deposition of Ag on periodic arrays of Si nanopillars," Opt. Express 19, 26056-26064 (2011)

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