Share Email Print

Proceedings Paper

Nanoantennas for enhancing and confining the magnetic optical field
Author(s): Thierry Grosjean; Mathieu Mivelle; Fadi I. Baida; Geoffrey W. Burr; Ulrich C. Fischer
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We propose different optical antenna structures for enhancing and confining the magnetic optical field. A common feature of these structures are concave corners in thin metal films as locations of the enhanced magnetic field. This proposal is inspired by Babinet's principle as the concave edges are the complementary structures to convex metal corners, which are known to be locations of a strongly enhanced electric field. Bowtie antennas and the bowtie apertures of appropriate size were shown to exhibit resonances in the infrared frequency range with an especially strong enhancement of the electrical field in the gap between 2 convex metal corners. We show by numerical calculations, that the complementary structures, the complementary bowtie aperture - the diabolo antenna - and the complementary bow tie antenna - two closely spaced triangular apertures in a metal film with a narrow gap between two opposing concave corners - exhibit resonances with a strongly enhanced magnetic field at the narrow metal constriction between the concave corners. We suggest sub-wavelength circuits of concave and convex corners as building blocks of planar metamaterials.

Paper Details

Date Published: 17 May 2011
PDF: 5 pages
Proc. SPIE 8070, Metamaterials VI, 807005 (17 May 2011); doi: 10.1117/12.886983
Show Author Affiliations
Thierry Grosjean, FEMTO-ST Institute, CNRS (France)
Mathieu Mivelle, FEMTO-ST Institute, CNRS (France)
Fadi I. Baida, FEMTO-ST Institute, CNRS (France)
Geoffrey W. Burr, IBM Almaden Research Ctr. (United States)
Ulrich C. Fischer, Univ. of Münster (Germany)
FEMTO-ST Institute, CNRS (France)

Published in SPIE Proceedings Vol. 8070:
Metamaterials VI
Vladimir Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?