Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 64: Nano-Optics III
Q 64.5: Vortrag
Freitag, 4. März 2016, 12:00–12:15, f342
On the existence of TE resonances in graphene-dielectric structures — •Julia F. M. Werra1, Francesco Intravaia2, and Kurt Busch1,2 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, 12489Berlin, Germany — 2Max Born Institute, 12489 Berlin, Germany
In this talk, we discuss the existence and the properties of TE resonances in graphene-dielectric structures. In our description we assume that the contact with the dielectric does alter graphene’s properties by inducing a bandgap in its electric bandstructure [1]. In contrast to previous results [2], we show that in this case the TE-plasmon resonance do not cease to exist.
Additionally, we show that, when graphene is in contact with a dielectric slab with finite thickness, it introduces a frequency cutoff for the slab’s waveguide modes. This is a pure quantomechanical effect closely related to the pair-creation threshold in graphene [3].
These results do not only offer new ways of designing waveguides but they also provide a basis to understand the behavior and lifetime of, e.g. emitters, in the proximity of such graphene-dielectric structures.
| [1] | J. Jung, A. M. DaSilva, A. H. MacDonald, and S. Adam, |
| Nat. Commun. 6, 6308 (2015). | |
| [2] | O. Kotov, M. Kol’chenko, and Y. E. Lozovik, Opt. Expr. 21, |
| 13533 (2013). | |
| [3] | J. F. M. Werra, F. Intravaia, and K. Busch, arXiv:1511.00408 |
| (2015). |