OREGON STATE UNIVERSITY

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Guided-mode-resonance-coupled plasmonic-active SiO2 nanotubes for surface enhanced Raman spectroscopy

TitleGuided-mode-resonance-coupled plasmonic-active SiO2 nanotubes for surface enhanced Raman spectroscopy
Publication TypeJournal Article
Year of Publication2012
AuthorsXu, X., D. Hasan, L. Wang, S. Chakravarty, R. T. Chen, D. L. Fan, and A. X. Wang
JournalApplied Physics Letters
Volume100
Issue19
Pagination191114
Date Published05/2012
ISSN00036951
Abstract

We demonstrate a surface enhanced Raman scattering (SERS) substrate by integrating plasmonic-active SiO₂ nanotubes into Si₃N₄ gratings. First, the dielectric grating that is working under guided mode resonance (GMR) provides enhanced electric field for localized surface plasmon polaritons on the surface of metallic nanoparticles. Second, we use SiO₂ nanotubes with densely assembled silver nanoparticles to provide a large amount of “hot spots” without significantly damping the GMR mode of the grating. Experimental measurement on Rhodamine-6G shows a constant enhancement factor of 8 ∼ 10 in addition to the existing SERS effect across the entire surface of the SiO₂ nanotubes.

DOI10.1063/1.4714710
Short TitleAppl. Phys. Lett.