Analytical expressions for the electromagnetic dyadic green's function in graphene and thin layers
| Autor: | Luis Martín-Moreno, Francisco J. Garcia-Vidal, Alexey Y. Nikitin |
|---|---|
| Přispěvatelé: | Ministerio de Educación, Cultura y Deporte (España), European Research Council |
| Rok vydání: | 2013 |
| Předmět: |
Electromagnetic field
Physics Condensed Matter - Mesoscale and Nanoscale Physics Point source FOS: Physical sciences 020206 networking & telecommunications 02 engineering and technology Function (mathematics) 01 natural sciences Atomic and Molecular Physics and Optics Condensed Matter - Other Condensed Matter Dipole symbols.namesake Wavelength Quantum electrodynamics Green's function Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering symbols Electrical and Electronic Engineering 010306 general physics Gradient descent Plasmon Other Condensed Matter (cond-mat.other) |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2011-2858 |
| Popis: | arXiv:1208.1397 An analytical general analysis of the electromagnetic dyadic Green's function for 2-D sheet (or a very thin film) is presented, with an emphasis on the case of graphene. A modified steepest descent treatment of the fields from a point dipole given in the form of Sommerfeld integrals is performed. We sequentially derive the expressions for both out-of-plane and in-plane fields of both polarizations. It is shown that the analytical approximation provided is very precise in a wide range of distances from a point source down to a deep subwavelength region (1/100 of wavelength). We separate the contribution from the pole, the branch point, and discuss their interference. The asymptotic expressions for the fields are composed of the plasmon, Norton wave, and the components corresponding to free space. This work was supported by the Spanish Ministry of Education, Culture and Sport under Contract MAT2011-28581-C02-02 and Consolider Project “Nanolight.es”. The work of F. J. Garcia-Vidal was supported by the European Research Council under Grant 290981. |
| Databáze: | OpenAIRE |
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