Higher-order resonant power flow inside and around superdirective plasmonic nanoparticles
JOSA B, Vol. 24, Issue 10, pp. A89-A97 (2007)
http://dx.doi.org/10.1364/JOSAB.24.000A89
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Abstract
The optical power flow around a plasmonic particle has been a topic of research interest over the years [see e.g., Am. J. Phys. 51, 323 (1983) ; Opt. Express 13, 8372 (2005) ]. Here we revisit this problem with an emphasis on higher-order resonances, and we present the theoretical results of our analysis for such power-flow distribution for plasmonic nanoparticles at their multipolar resonances. Results for the second and third orders of resonance show optical power-flow patterns that are significantly different from that of the first-order resonance inside and around plasmonic superdirective nanoparticles, with multicenter vortices, saddle points, and saddle lines and with an anomalous circulation of power resembling higher-order modes in a resonant cavity. A potential application of these optical flow patterns to trap or move a neighboring nanoparticle is also briefly suggested.
© 2007 Optical Society of America
OCIS Codes
(160.3900) Materials : Metals
(240.6680) Optics at surfaces : Surface plasmons
(290.4020) Scattering : Mie theory
History
Original Manuscript: March 19, 2007
Manuscript Accepted: May 15, 2007
Published: August 16, 2007
Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics
Photonic Metamaterials (2007) JOSA A
Citation
Andrea Alù and Nader Engheta, "Higher-order resonant power flow inside and around superdirective plasmonic nanoparticles," J. Opt. Soc. Am. B 24, A89-A97 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-10-A89
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