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Local electric field enhancement during nano-focusing of plasmons by a tapered gap

Gramotnev, Dmitri, Pile, David, Vogel, Michael W., & Zhang, Xiang (2007) Local electric field enhancement during nano-focusing of plasmons by a tapered gap. Physical Review B (Condensed Matter and Materials Physics), 75(3), 035431.

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Abstract

We demonstrate that during plasmon nano-focusing in a tapered gap (V-groove), local electric field experiences much stronger enhancement than the magnetic field. Two distinct asymptotic regimes are found near the tip of the groove: the electric field approaches either zero or infinity when dissipation is above or below a critical level (at a fixed taper angle), or taper angle is smaller or larger than a critical angle (at a fixed level of dissipation). Tapered gaps are shown to be the best option for achieving maximal field enhancement, compared to nano-wedges and tapered rods. An optimal taper angle is determined.

Impact and interest:

43 citations in Scopus
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52 citations in Web of Science®

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413 since deposited on 19 Mar 2007
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ID Code: 6585
Item Type: Journal Article
DOI: 10.1103/PhysRevB.75.035431
ISSN: 1098-0121
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CONDENSED MATTER PHYSICS (020400) > Condensed Matter Physics not elsewhere classified (020499)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Optical Physics not elsewhere classified (020599)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanotechnology not elsewhere classified (100799)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2007 American Physical Society
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 19 Mar 2007
Last Modified: 29 Feb 2012 23:37

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