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Frequency-domain simulations of optical antenna structures
Proc. SPIE 6617, 66170E (2007); http://dx.doi.org/10.1117/12.725876
Monday 18 June 2007
Munich, Germany
Modeling Aspects in Optical Metrology
Harald Bosse, Bernd Bodermann, Richard M. Silver
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Add to FacebookOptical 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.
© 2007 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Online Jun 18, 2007
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Christian Hafner, Xudong Cui, Andre Bertolace and Rüdiger Vahldieck, "Frequency-domain simulations of optical antenna structures",
Proc. SPIE 6617, 66170E (2007); http://dx.doi.org/10.1117/12.725876
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