Birefringent Curvature Control of Surface Plasmons and Collective Emission

Florian Bönsel; Flore K. Kunst

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arXiv · 2603.27702

Birefringent Curvature Control of Surface Plasmons and Collective Emission

Florian Bönsel·Flore K. Kunst

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Abstract

We present a generic wave equation for surface plasmon polaritons on any macroscopically curved metal-dielectric interface, with isotropic and anisotropic geometric potentials linear in curvature. Remarkably, the anisotropic birefringence vanishes if the metal-to-dielectric permittivity ratio equals the golden ratio squared, mimicking isotropy at linear order on an actually anisotropic surface, as confirmed by full-wave simulations. Applying our equation to quantum emitters on metallic spheres, we demonstrate a curvature-controlled reshaping of collective decay rates and frequency shifts.

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BibTeX RIS

Florian Bönsel, Flore K. Kunst. 2026-03-29. Birefringent Curvature Control of Surface Plasmons and Collective Emission. https://arxiv.org/abs/2603.27702

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