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Resonant SPP modes supported by discrete metal nanoparticles on high-index substrates
- Source :
- Optics Express
- Publication Year :
- 2011
-
Abstract
- We provide a new physical interpretation of scattering from plasmonic nanoparticles on high-index substrates. We demonstrate the excitation of different types of resonant modes on disk-shaped, Ag nanoparticles. At short wavelengths, the resonances are localised at the top of the particle, while at longer wavelengths they are localised at the Ag/substrate interface. We attribute the long wavelength resonances to geometric resonances of surface plasmon polaritons (SPPs) at the Ag/substrate interface. We show that particles that support resonant SPP modes have enhanced scattering cross-sections when placed directly on a high-index substrate; up to 7.5 times larger than that of a dipole scatterer with an equivalent free-space resonance. This has implications for designing scattering nanostructures for light trapping solar cells.
- Subjects :
- Plasmonic nanoparticles
Materials science
Scattering
business.industry
Mie scattering
Physics::Optics
Resonance
02 engineering and technology
021001 nanoscience & nanotechnology
7. Clean energy
01 natural sciences
Surface plasmon polariton
Atomic and Molecular Physics, and Optics
010309 optics
Dipole
Optics
0103 physical sciences
Surface plasmon resonance
0210 nano-technology
business
Plasmon
Subjects
Details
- ISSN :
- 10944087
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....b1cb2ecc0abe6fe5aef7a3fbf68561d5
- Full Text :
- https://doi.org/10.1364/OE.19.00A146