Conference Proceedings
Mixed dimer double-resonance substrates for surface-enhanced Raman spectroscopy
MG Banaee, KB Crozier
ACS Nano | Published : 2011
DOI: 10.1021/nn102726j
Abstract
Surface-enhanced Raman spectroscopy is performed on pairs of gold nanoparticles, for which the nanoparticles in each pair have different shapes. The dimers therefore exhibit two plasmon resonances. These structures, termed mixed dimer double-resonance substrates, enable strong field enhancement at pump and Stokes frequencies in surface-enhanced Raman spectroscopy. The extinction spectra of mixed dimers are measured and simulated to identify their plasmon resonances. The experimentally determined enhancement factors of double-resonance structures are compared to those of single-resonance substrates. © 2011 American Chemical Society.
Grants
Awarded by Defense Advanced Research Projects Agency
Funding Acknowledgements
This work was supported by the Defense Advanced Research Projects Agency (contract FA9550-08-1-0285). Fabrication was carried out at the Harvard Center for Nanoscale Systems, which is supported by the National Science Foundation. We thank Dr. Paul Peng and Prof. Mazur (Harvard University) for use of their Raman spectrometer.