Journal
NANO LETTERS
Volume 10, Issue 11, Pages 4680-4685Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1029732
Keywords
Fano resonance; plasmon; coupling; self-assembly; nanoshell; nanocluster
Categories
Funding
- NSF NIRT [0709323]
- DoD NSSEFF
- Robert A. Welch Foundation [C-1220, C-1222, E-1728]
- ARO
- AFOSR
- NSF [CNS-0821727]
- Center for Advanced Solar Photophysics
- U.S. Department of Energy
- Air Force Office of Scientific Research (AFOSR) [FA9550-06-1-0279, FA9550-08-1-0394]
- TcSUH
- GEAR of the University of Houston
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0709323] Funding Source: National Science Foundation
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Assemblies of strongly interacting metallic nanoparticles are the basis for plasmonic nanostructure engineering. We demonstrate that clusters of four identical spherical particles self-assembled into a close-packed asymmetric quadrumer support strong Fano-like interference. This feature is highly sensitive to the polarization of the incident electric held due to orientation-dependent coupling between particles in the cluster. This structure demonstrates how careful design of self-assembled colloidal systems can lead to the creation of new plasmonic modes and the enabling of interference effects in plasmonic systems.
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