Regensburg 2010 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 60: Poster II: Optical Properties, incl. Photonic Crystals and Ultrafast Phenomena

HL 60.15: Poster

Donnerstag, 25. März 2010, 18:00–20:00, Poster D1

Nonlinear Optical Spectroscopy of Metamaterials — •Mathieu Gentile¹, Richard Taubert², Mario Hentschel², Harald Giessen², and Manfred Fiebig¹ — ¹Helmholtz-Institut für Strahlen- und Kern- physik, Universität Bonn, Germany — ²4. Physikalisches Institut, Universität Stuttgart, Germany

Optical metamaterials are the gateway to fundamentally new optical properties: they allow materials with negative values for the effective electric permittivity, ε, and magnetic permeability, µ.

We present a set of second harmonic generation (SHG) spectra of gold structure arrays on a glass substrate with various geometries. With amplified 130 fs laser pulses, the spectral response was measured in the range from 1.55 eV to 3.00 eV.

Measurements are in perfect agreement with the SHG tensor components allowed by the sample symmetry. The linear reflection spectrum of these structures displays a resonance for photon energies around 0.82 eV. In contrast, SHG spectra reveal resonances at different photon energies that are determined by the geometry of the metamaterial “atoms” while the linear optical properties of the metamaterial and the spectral characteristics of the gold appear to be of minor significance.