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Q: Fachverband Quantenoptik und Photonik
Q 2: QED
Q 2.4: Vortrag
Montag, 11. März 2024, 11:45–12:00, HS 1015
Numerical evaluation of Casimir-Lifshitz forces in the time domain — •Carles Martí Farràs1, Philip Kristensen2,3, Bettina Beverungen1, Francesco Intravaia1, and Kurt Busch1,4 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, Newtonstr. 15, 12489 Berlin, Germany — 2DTU Electro, Technical University of Denmark, Lyngby, Denmark — 3NanoPhoton - Center for Nanophotonics, Technical University of Denmark, Lyngby, Denmark — 4Max Born Institute, Berlin, Germany
Fluctuation-induced phenomena, stemming from both quantum and thermal fluctuations, which are inherent in nature, exhibit fascinating effects that become particularly relevant at short-length scales. A notable example is the Casimir effect, which describes a usually attractive force between electrically neutral macroscopic objects. Apart from their fundamental interest, a comprehensive understanding of such interactions is crucial for the progress of nanostructured device development. Since analytical calculations are only possible for a few highly symmetric geometries, this has prompted the development of methods to numerically evaluate Casimir forces in the context of complex geometries and material models. Here, we present a time-domain finite-element-based numerical approach leveraging the capabilities of the discontinuous Galerkin time-domain (DGTD) method. It allows to accurately assess the electromagnetic response of the system, providing a robust and efficient framework for systematically evaluating Casimir forces in a wide range of configurations.
Keywords: Fluctuation-induced phenomena; Dispersive forces; Casimir effect; Numerical methods; Discontinuous Galerkin time-domain method