Plasmonic nanoclusters: near field properties of the Fano resonance interrogated with SERS

Nano Letters
Jian YeNaomi J Halas

Abstract

While the far field properties of Fano resonances are well-known, clusters of plasmonic nanoparticles also possess Fano resonances with unique and spatially complex near field properties. Here we examine the near field properties of individual Fano resonant plasmonic clusters using surface-enhanced Raman scattering (SERS) both from molecules distributed randomly on the structure and from dielectric nanoparticles deposited at specific locations within the cluster. Cluster size, geometry, and interparticle spacing all modify the near field properties of the Fano resonance. For molecules, the spatially dependent SERS response obtained from near field calculations correlates well with the relative SERS intensities observed for individual clusters and for specific Stokes modes of a para-mercaptoaniline adsorbate. In all cases, the largest SERS enhancement is found when both the excitation and the Stokes shifted wavelengths overlap the Fano resonances. In contrast, for SERS from carbon nanoparticles we find that the dielectric screening introduced by the nanoparticle can drastically redistribute the field enhancement associated with the Fano resonance and lead to a significantly modified SERS response compared to what would be antici...Continue Reading

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Citations

Aug 4, 2012·ACS Applied Materials & Interfaces·Renping MaLifeng Chi
Apr 27, 2012·Nano Letters·Naveen GandraSrikanth Singamaneni
Aug 29, 2012·Nano Letters·Wei-Shun ChangStephan Link
Oct 30, 2012·Nano Letters·Wenqi ZhuKenneth B Crozier
Jan 1, 2013·Nano Letters·Benjamin GallinetOlivier J F Martin
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Apr 28, 2012·ACS Nano·Alyssa J PasqualeLuca Dal Negro
Apr 26, 2013·ACS Nano·Andrea LoveraOlivier J F Martin
Apr 10, 2013·Proceedings of the National Academy of Sciences of the United States of America·Joel HenziePeidong Yang
May 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Yu ZhangNaomi J Halas
Nov 19, 2015·ACS Nano·Shu ChenZhong-Qun Tian
Jan 8, 2016·Nature Nanotechnology·Saman Jahani, Zubin Jacob
May 9, 2013·Scientific Reports·Gobind DasEnzo Di Fabrizio
Oct 2, 2015·ACS Nano·Nicholas S KingNaomi J Halas
Apr 18, 2013·The Journal of Physical Chemistry Letters·Yang LiPeter Nordlander
Aug 25, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Satoshi WatanabeMinoru T Miyahara
Mar 13, 2014·ACS Nano·Thomas SiegfriedHans Sigg
Apr 5, 2014·ACS Nano·Jérémy Butet, Olivier J F Martin

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