Frankfurt 2006 – scientific programme
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Q: Quantenoptik und Photonik
Q 35: Poster Photonische Kristalle
Q 35.10: Poster
Tuesday, March 14, 2006, 16:30–18:30, Labsaal
Phase-resolved pulse propagation in metallic photonic crystal slabs — •Anja Schönhardt1, Dietmar Nau1, Hedi Gräbeldinger2, Christina Bauer3, and Harald Giessen2 — 1Institut für Angewandte Physik, Universität Bonn, 53115 Bonn — 24. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart — 3Max-Planck Institut für Festkörperforschung, 70569 Stuttgart
We present measurements of the electromagnetic field of ultra-short laser pulses after propagation through metallic photonic crystal structures featuring simultaneous photonic and plasmonic resonances. We used cross-correlation frequency resolved optical gating to measure the complete pulse information, i.e., the envelope and phase of the electromagnetic field. In good agreement, measurements and scattering matrix simulations [1] show a dispersive behavior of the spectral phase at the position of the resonances. Asymmetric Fano-type resonances go along with asymmetric phase characteristics. Furthermore, the spectral phase is used to calculate the dispersion of the sample. Possible application in dispersion compensation is investigated. The behavior of the extinction and the spectral phase can be understood from a fundamental model using the complex transmission amplitude [2,3]. An associated depiction in the complex plane is a new approach in this context [3]. This method promises to be of valuable use also in photonic crystal and filter design, for example with regards to symmetrization of the resonances.
[1] S. Tikhodeev et al., Phys. Rev. B 66, 045102 (2002).
[2] S. Fan et al., Phys. Rev. B 65, 235112 (2002).
[3] A. Schönhardt et al., PRB, to be published.