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Extraordinary local angular momentum near metallic nanoparticles
Author(s): Alessandro Alabastri; Xiao Yang; Alejandro Manjavacas; Henry O. Everitt; Peter Nordlander
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Paper Abstract

Plasmonic nanostructures provide strong field enhancements which can be exploited for surface enhanced spectroscopies. However, metallic nanoparticles can also induce large electromagnetic field gradients near their surfaces. Sizeable field gradients can excite dipole-forbidden transitions in nearby atoms or molecules and provide unique spectroscopic fingerprinting for chemical sensing. At this purpose we introduce the concept of the Local Angular Momentum (LAM) vector as a useful figure of merit for the design of nanostructures that provide large field gradients. This quantity is particularly well suited for optimization using numerical grid-based full wave electromagnetic simulations.

Paper Details

Date Published: 17 September 2016
PDF: 5 pages
Proc. SPIE 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV, 992107 (17 September 2016); doi: 10.1117/12.2238581
Show Author Affiliations
Alessandro Alabastri, Rice Univ. (United States)
Xiao Yang, Rice Univ. (United States)
Alejandro Manjavacas, The Univ. of New Mexico (United States)
Henry O. Everitt, U.S. Army Aviation & Missile Research, Development & Engineering Ctr. (United States)
Duke Univ. (United States)
Peter Nordlander, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 9921:
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV
Satoshi Kawata; Din Ping Tsai, Editor(s)

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