Wang, Y;
You, JW;
Panoiu, NC;
(2021)
All-optically Control of Light Propagation in Valley-Hall Topological Waveguides of Graphene Metasurfaces.
In:
2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials).
(pp. pp. 454-456).
IEEE: New York, NY, USA.
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Abstract
We study the influence of graphene Kerr effect on valley-Hall topological modes of a graphene plasmonic crystal waveguide. Extra air holes are introduced to break the spatial-inversion symmetry of the plasmonic metasurface, which can be performed using e-beam lithography. As a result, a gapless Dirac cone and topologically protected edge modes form inside the nontrivial frequency bandgap. Taking advantage of the fact that graphene is a nonlinear optical material possessing an extremely large Kerr coefficient, we demonstrate that an all-optical switch can be implemented in this topological photonic system by controlling an optical signal propagating in the waveguide via a pump beam injected into the bulk modes of the metasurface. This work may lead to new graphene-based active topological photonic nanodevices.
| Type: | Proceedings paper |
|---|---|
| Title: | All-optically Control of Light Propagation in Valley-Hall Topological Waveguides of Graphene Metasurfaces |
| Event: | 15th International Congress on Artificial Materials for Novel Wave Phenomena - Metamaterials 2021 |
| ISBN-13: | 9781728150185 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/Metamaterials52332.2021.9577127 |
| Publisher version: | http://dx.doi.org/10.1109/Metamaterials52332.2021.... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Photonic band gap , Optical switches, Graphene, Metasurfaces, Plasmons, Optical pumping, Optical materials |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10139957 |
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