Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 51: Photonic crystals II
HL 51.6: Vortrag
Freitag, 27. März 2009, 11:45–12:00, BEY 154
Nonlinear Optical Spectroscopy of Metamaterials — •Mathieu Gentile1, Mario Hentschel1, Hongcang Guo2, Harald Giessen2, and Manfred Fiebig1 — 1Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany — 24. Physikalisches Institut, Universität Stuttgart, Germany
Optical metamaterials recently gained considerable attention since they offer genuinely new optical properties with possible negative value for effective electric permittivity, ε, and magnetic permeability, µ.
We measure the first-ever second harmonic generation (SHG) spectra of ⊔-shaped gold structure arrays on a glass substrate. Using a 130 fs OPA-tunable laser source the spectral response was measured in the SHG range from 1.64 eV to 3.00 eV.
Measurements are in perfect agreement with tensor components allowed by sample symmetry. The linear reflection spectrum of these structures displays a resonance for photon energies around 0.83 eV. In contrast, SHG spectra reveal resonances at different photon energies that are determined by the actual geometry of the metamaterial “atoms” while the linear optical properties of the metamaterial and the spectral characteristics of the gold are of minor significance.