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Long-Distance Indirect Excitation of Nanoplasmonic Resonances

Worawut Khusin ; Björn Brian (Institutionen för teknisk fysik, Bionanofotonik) ; Jens Dorfmueller ; Moritz Esslinger ; Ralf Vogelgesang ; Christoph Etrich ; Alexandre Dmitriev (Institutionen för teknisk fysik, Bionanofotonik) ; Klaus Kern
Nano Letters (1530-6984). Vol. 11 (2011), 7, p. 2765-2769.
[Artikel, refereegranskad vetenskaplig]

In nanoscopic systems, size, geometry, and arrangement are the crucial determinants of the light-matter interaction and resulting nanoparticles excitation. At optical frequencies, one of the most prominent examples is the excitation of localized surface plasmon polaritons, where the electromagnetic radiation is coupled to the confined charge density oscillations. Here, we show that beyond direct near- and far-field excitation, a long-range, indirect mode of particle excitation is available in nanoplasmonic systems. In particular, in amorphous arrays of plasmonic nanodiscs we find strong collective and coherent influence on each particle from its entire active neighborhood. This dependency of the local field response on excitation conditions at distant areas brings exciting possibilities to engineer enhanced electromagnetic fields through controlled, spatially configured illumination.



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Denna post skapades 2011-07-23. Senast ändrad 2011-08-16.
CPL Pubid: 143593

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Bionanofotonik (2007-2015)

Ämnesområden

Materialvetenskap
Nanovetenskap och nanoteknik
Optik
Optisk fysik

Chalmers infrastruktur