Field enhancement at metallic interfaces due to quantum confinement
| Autor: | Antti-Pekka Jauho, Martijn Wubs, Z. Fatih Ozturk, N. Asger Mortensen, Sanshui Xiao, Min Yan |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Electron density Condensed matter physics ta114 field enhancement Condensed Matter - Mesoscale and Nanoscale Physics zero-epsilon phenomena Jellium Friedel oscillations FOS: Physical sciences nanoplasmonics Dielectric Electron Condensed Matter Physics Electronic Optical and Magnetic Materials symbols.namesake Maxwell's equations Electric field Mesoscale and Nanoscale Physics (cond-mat.mes-hall) symbols Boundary value problem Electric displacement field Optics (physics.optics) Physics - Optics |
| Popis: | We point out an apparently overlooked consequence of the boundary conditions obeyed by the electric displacement vector at air-metal interfaces: the continuity of the normal component combined with the quantum mechanical penetration of the electron gas in the air implies the existence of a surface on which the dielectric function vanishes. This, in turn, leads to an enhancement of the normal component of the total electric field. We study this effect for a planar metal surface, with the inhomogeneous electron density accounted for by a Jellium model. We also illustrate the effect for equilateral triangular nanoislands via numerical solutions of the appropriate Maxwell equations, and show that the field enhancement is several orders of magnitude larger than what the conventional theory predicts. |
| Databáze: | OpenAIRE |
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