SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.65: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Influence of nonlocal and dispersive material response on fields of metallic plasmons — •Gino Wegner1, 2, Dan-Nha Huynh1, Bill Antonio Bernhardt1, Francesco Intravaia1, and Kurt Busch1,3 — 1Institut für Physik, Humboldt-Universität zu Berlin, AG Theoretische Optik & Photonik, 12489 Berlin, Germany — 2Institute of Condensed Matter Theory and Optics, Friedrich-Schiller-University Jena, Max- Wien-Platz 1, 07743 Jena, Germany — 3Max-Born-Institut, 12489 Berlin, Germany
Based on the insight that using (noble) metallic nanostructures or -features as subtrates for molecules, can significantly boost the Raman signal of nearby molecules due to plasmonic resonances, we investigate the fields of the latter in the vicinity of the metal surface. Based on established material models for the conduction-electronic response to light, we perform analytical Mie calculations as well as numerical simulations employing the Discontinuous Galerkin Time Domain method. The role of nonlocal and dispersive response is critically examined always keeping in mind the intertwining with geometrical features of the subtrates. For a selection of geometries, this study sheds light on pecularities, that have to be kept in mind, when designing metallic substrates for Surface Enhanced Raman Scattering/Spectroscopy.