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O: Fachverband Oberflächenphysik

O 91: Plasmonics and Nanooptics V: Waveguides and Antennas

O 91.3: Vortrag

Freitag, 31. März 2023, 11:00–11:15, CHE 89

Directional transport in plasmonic waveguide arrays in the presence of disorder — •Anna Sidorenko and Stefan Linden — Physikalisches Institut, Friedrich-Wilhelms-Universität Bonn, Kreuzbergweg 24, 53115-Bonn, Germany

Evanescently coupled waveguides provide a convenient platform for the simulation of various quantum phenomena whose experimental realization in analogous condensed matter systems is otherwise difficult. The basis for this is the mathematical equivalence of the coupled mode theory equations and the discrete Schrödinger equation in the tight-binding approximation. Here we present a comparative study of the robustness of directional transport in presence of disorder in two periodically driven waveguides systems - ratchets [1] and fast Thouless pumps [2]. Directional transport in a ratchet requires fine-tuning of the driving parameters. In contrast, directional transport in Thouless pumping is a topological effect that exists for a range of driving frequencies considering the closed cycle in parameter space. We analyze the effect of topological protection on directional transport by introducing identical disorder distributions to both systems.

References:

[1] Z. Fedorova, C. Dauer, A. Sidorenko, S. Eggert, J. Kroha, S. Linden, "Dissipation engineered directional filter for quantum ratchets". Physical Review Research 3(1), 013260 (2021).

[2] Z. Fedorova, H. Qiu, S. Linden, J. Kroha, "Observation of topological transport quantization by dissipation in fast Thouless pumps," Nature communications 11, 3758 (2020).