SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Nano-optics

Q 30.3: Vortrag

Mittwoch, 8. März 2023, 11:30–11:45, F442

Nonlocal Soft Plasmonics: Ionic plasmon effects in planar homogeneous multi-layered systems — •Preethi Ramesh Narayan and Christin David — Institute of Condensed Matter Theory and Optics (IFTO), Abbe Center of Photonics, Friedrich-Schiller-University Jena (FSU Jena), Jena, Germany

Plasmonics is the study of resonant interactions between free electrons present in the conduction band of metals and incident electromagnetic radiation. These resonant interactions result in surface plasmon waves that propagate along the surface at the metal-dielectric interface. Apart from metals, such charge oscillations can also be found in soft matter as a charged ionic fluid in an impermeable lipid membrane. Such a system can be studied analogously from the behavior of metal nanosystems, with lower resonance frequencies in larger ionic systems. We study the ionic plasmon interactions in planar electrolyte systems. We also consider the nonlocal interactions between the charge carriers that happen due to strong spatial confinement on the microscale. The optical response of free positive and negative ions in an electrolyte is explained using a hydrodynamic, two-fluid model under the scope of nonlocality. These ions oscillate with different bulk plasmon frequencies based on their respective charge, mass, and concentration. This allows analyzing the nonlocal plasmonic effects through highly tunable system parameters. We develop this system further with the aim to understand energy transfer in nerve cells and electrolyte-solid interactions for photocatalysis.