## 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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### References

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