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Quantum ergodicity and localization of plasmon resonances

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posted on 2023-11-30, 19:33 authored by Habib Ammari, Yat Tin Chow, Hongyu Liu
We are concerned with the geometric properties of the surface plasmon resonance (SPR). SPR is a non-radiative electromagnetic surface wave that propagates in a direction parallel to the negative permittivity/dielectric material interface. It is known that the SPR oscillation is very sensitive to the material interface. However, we show that the SPR oscillation asymptotically localizes at places with high magnitude of curvature in a certain sense. Our work leverages the Heisenberg picture of quantization and quantum ergodicity first derived by Shnirelman, Zelditch, Colin de Verdi\`ere and Helffer-Martinez-Robert, as well as certain novel and more general ergodic properties of the Neumann-Poincar\'e operator to analyze the SPR field, which are of independent interest to the spectral theory and the potential theory.

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