Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 74: Nanostructures at surfaces: Other aspects
O 74.7: Vortrag
Mittwoch, 14. März 2018, 18:15–18:30, MA 141
Nonlinear optical Circular Dichroism from plasmonic Metasurfaces — •Bernhard Reineke1, Guixin Li1, Shumei Chen2, Franziska Zeuner1, Martin Weismann3, Ventsislav Kolev Valev4, Kok Wai Cheah5, Nicolae Panoiu3, Shuang Zhang2, and Thomas Zentgraf1 — 1Department of Physics, University of Paderborn, Warburger Straße 100 D-33098 Paderborn, Germany — 2School of Physics & Astronomy, University of Birmingham, Birmingham B15 2TT, UK — 3Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1 E7JE, UK — 4Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK — 5Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong
Circular Dichroism is the unequal absorption of left and right circularly polarized light. This effect is weak in planar Metasurfaces. Alternatively, Second Harmonic Generation Circular Dichroism (CD) from planar Metasurfaces is more responsive, than its linear analogue. We report a strong nonlinear circular dichroism for Second and Third Harmonic Generation from specially designed plasmonic Metasurfaces. In the future, these results, together with cheaper fabrication methods for Metamaterials enable a greater freedom in designing nonlinear optical devices.