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DS: Fachverband Dünne Schichten
DS 47: [O] Plasmonics and Nanooptics VII (Joint Session DS/O/HL)
DS 47.2: Vortrag
Freitag, 26. März 2010, 11:30–11:45, H32
Optical properties of a metallic meander Fabry-Perot cavity — •Liwei Fu1, Heinz Schweizer1, Thomas Weiss2, Harald Giessen1, Philipp Schau3, Karsten Frenner3, Steffen Maisch3, and Wolfgang Osten3 — 14th Physics Institute, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 2LASMEA, Université Blaise Pascal, F-63177 Aubière Cedex, France — 3Institut für Technische Optik, University of Stuttgart, Pfaffenwaldring 9, 70550 Stuttgart, Germany
A single layer metallic meander structure is favorable to couple photons with surface plasmon polaritons and, as a result, a resonant enhanced transmission can be observed. A combination of two single-meander layers forms a Fabry-Perot cavity with frequency selective mirrors. In this contribution we investigate its optical properties. At the proper distance, the cavity behaves as a single layer meander, in which enhanced transmission and negative mode dispersion are present. In contrast to the single layer, however, the surface waves from the two mirrors are still coupled together, resulting in an amplified longitudinal E-field propagating backwards inside the cavity. The backward wave can be observed at visible frequencies with low loss and high transmittance for structural parameters that are well suited for nano-fabrication. Such a compact realization of negative refraction is a promising approach for applications of subwavelength imaging, polarization beam splitting, and delay line approaches.