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Proceedings Paper

Frequency-domain simulations of optical antenna structures
Author(s): Christian Hafner; Xudong Cui; Andre Bertolace; Rüdiger Vahldieck
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Paper Abstract

Optical antennas consisting of metallic parts are analyzed using the Multiple Multipole Program (MMP), a semi-analytic boundary discretization method. It is demonstrated that difficult numerical problems are caused because optical antennas exhibit strong material dispersion, loss, and plasmon-polariton effects that require a very fine discretization. In addition to standard dipole-type antennas, consisting of two pieces of metal, a new structure consisting of a single metal piece with a tiny groove in the center is analyzed. This structure takes advantage of the Channel Plasmon-Polariton (CPP) effect and exhibits a strong enhancement of the electric field in the groove. Furthermore, the groove type antenna exhibits two resonance peaks when its dimension is much smaller than the wavelength. It is demonstrated that the strengths and locations of the resonance peaks may be tuned within some range by tuning the length of the antenna.

Paper Details

Date Published: 18 June 2007
PDF: 12 pages
Proc. SPIE 6617, Modeling Aspects in Optical Metrology, 66170E (18 June 2007); doi: 10.1117/12.725876
Show Author Affiliations
Christian Hafner, ETH Zurich (Switzerland)
Xudong Cui, ETH Zurich (Switzerland)
Andre Bertolace, ETH Zurich (Switzerland)
Rüdiger Vahldieck, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 6617:
Modeling Aspects in Optical Metrology
Harald Bosse; Bernd Bodermann; Richard M. Silver, Editor(s)

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