Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.64: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Optimizing the excitation of plasmonic waveguide modes by a nanoantenna — •Jing Wen and Peschel Ulf — MPI für die Physik des Lichts, Erlangen, Germany

Plasmonic waveguides can be regarded as key elements of a future optical integration on a sub-wavelength scale. Hence, their coupling to the macroscopic world namely their excitation remains a challenging task. Here we propose to use nanoantennas to achieve that goal. We performed numerical simulations of the excitation of a plasmonic gap waveguide by a dipole antenna, which is attached to it. The coupling efficiency is strongly influenced by the properties of both the antenna and the plasmonic waveguide. For an optimized configuration the coupling efficiency of the antenna-based excitation can be more than 100 times larger than that without antenna. Surprisingly this optimization can to some extend be performed by using arguments from classical microwave theory as e.g. impedance matching.