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Mode-specific directional emission from hybridized particle-on-a-film plasmons

Vladimir D. Miljkovic (Institutionen för teknisk fysik, Bionanofotonik) ; Timur Shegai (Institutionen för teknisk fysik, Bionanofotonik) ; Mikael Käll (Institutionen för teknisk fysik, Bionanofotonik) ; Peter Johansson (Institutionen för teknisk fysik, Bionanofotonik)
Optics Express (1094-4087). Vol. 19 (2011), 14, p. 12856-12864.
[Artikel, refereegranskad vetenskaplig]

We investigate the electromagnetic interaction between a gold nanoparticle and a thin gold film on a glass substrate. The coupling between the particle plasmons and the surface plasmon polaritons of the film leads to the formation of two localized hybrid modes, one low-energy. film-like. plasmon and one high-energy plasmon dominated by the nanoparticle. We find that the two modes have completely different directional scattering patterns on the glass side of the film. The high-energy mode displays a characteristic dipole emission pattern while the low-energy mode sends out a substantial part of its radiation in directions parallel to the particle dipole moment. The relative strength of the two radiation patterns vary strongly with the distance between the particle and the film, as determined by the degree of particle-film hybridization.

Denna post skapades 2011-09-12. Senast ändrad 2015-12-17.
CPL Pubid: 146062


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Bionanofotonik (2007-2015)


Elektroteknik och elektronik

Chalmers infrastruktur

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