Graphene Plasmons in Triangular Wedges and Grooves
| Autor: | Gonçalves, P. A. D., Dias, E. J. C., Xiao, Sanshui, Vasilevskiy, M. I., Mortensen, N. Asger, Peres, N. M. R. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | ACS Photonics, 2016, 3 (11), pp 2176-2183 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/acsphotonics.6b00674 |
| Popis: | The ability to effectively guide electromagnetic radiation below the diffraction limit is of the utmost importance in the prospect of all-optical plasmonic circuitry. Here, we propose an alternative solution to conventional metal-based plasmonics by exploiting the deep subwavelength confinement and tunability of graphene plasmons guided along the apex of a graphene-covered dielectric wedge or groove. In particular, we present a quasi-analytic model to describe the plasmonic eigenmodes in such a system, including the complete determination of their spectrum and corresponding induced potential and electric field distributions. We have found that the dispersion of wedge/groove graphene plasmons follows the same functional dependence as their flat-graphene plasmons counterparts, but now scaled by a (purely) geometric factor in which all the information about the system's geometry is contained. We believe our results pave the way for the development of novel custom-tailored photonic devices for subwavelength waveguiding and localization of light based on recently discovered 2D materials. Comment: Published in ACS Photonics |
| Databáze: | arXiv |
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