Slowing down surface plasmons on a moiré surface
| Autor: | Askin Kocabas, Atilla Aydinli, S. Seckin Senlik |
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| Přispěvatelé: | Kocabaş, Aşkın, Şenlik, S. Seçkin, Aydınlı, Atilla |
| Rok vydání: | 2008 |
| Předmět: |
Plasmons
Physics Adjacent nodes Condensed matter physics Tight-binding models Light velocity Zero-group velocities Surface plasmon High-quality factors Physics::Optics General Physics and Astronomy Surface plasmons Coupling (probability) Slow propagation Radiation loss Group velocities Coupled cavities Tight binding Amplitude Band edges Node (physics) Quasiparticle Group velocity Plasmon |
| Zdroj: | Physical Review Letters |
| ISSN: | 0031-9007 |
| Popis: | We have demonstrated slow propagation of surface plasmons on metallic Moir\'e surfaces. The phase shift at the node of the Moir\'e surface localizes the propagating surface plasmons and adjacent nodes form weakly coupled plasmonic cavities. Group velocities around ${v}_{g}=0.44c$ at the center of the coupled cavity band and almost a zero group velocity at the band edges are observed. A tight binding model is used to understand the coupling behavior. Furthermore, the sinusoidally modified amplitude about the node suppresses the radiation losses and reveals a relatively high quality factor ($Q=103$). |
| Databáze: | OpenAIRE |
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