Title

Cascaded Plasmon Resonances Multi-Material Nanoparticle Trimers For Extreme Field Enhancement

Keywords

Asymmetric plasmons; Cascaded plasmon resonance; Field enhancement; Heterotrimers; Trimer

Abstract

Optical field enhancement in coupled plasmonic nanostructures has attracted significant attention because of field enhancement factors that significantly exceed those observed in isolated nanostructures. While previous studies demonstrated the existence of such cascaded field enhancement in coupled nanospheres with identical composition, this effect has not yet been studied in systems containing multiple materials. Here, we investigate the polarization-dependent optical response of multi-material trimer nanostructures composed of Au nanoparticles surrounded by two Ag nanoparticles as a function of nanoparticle size and inter-particle spacing. We observe field enhancement factors that are ten times larger than observed in isolated Au nanoparticles. © 2013 SPIE.

Publication Date

1-1-2013

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8809

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2024709

Socpus ID

84899902358 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84899902358

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