Physical Violations of the Bulk-Edge Correspondence in Topological Electromagnetics
| Autor: | S. Ali Hassani Gangaraj, Francesco Monticone |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
Physics Electromagnetics FOS: Physical sciences General Physics and Astronomy For All Practical Purposes 02 engineering and technology 021001 nanoscience & nanotechnology Topology 01 natural sciences Photonic metamaterial Quantum nonlocality 0103 physical sciences Correspondence principle Wavenumber Landau damping 010306 general physics 0210 nano-technology Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical Review Letters. 124 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.124.153901 |
| Popis: | In this Letter, we discuss two general classes of apparent violations of the bulk-edge correspondence principle for continuous topological photonic materials, associated with the asymptotic behavior of the surface modes for diverging wave numbers. Considering a nonreciprocal plasma as a model system, we show that the inclusion of spatial dispersion (e.g., hydrodynamic nonlocality) formally restores the bulk-edge correspondence by avoiding an unphysical response at large wave numbers. Most importantly, however, our findings show that, for the considered cases, the correspondence principle is physically violated for all practical purposes, as a result of the unavoidable attenuation of highly confined modes even if all materials are assumed perfect, with zero intrinsic bulk losses, due to confinement-induced Landau damping or nonlocality-induced radiation leakage. Our work helps clarifying the subtle and rich topological wave physics of continuous media. |
| Databáze: | OpenAIRE |
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