Sunday, July 14, 2013

Abstract-Terahertz relativistic spatial solitons in doped graphene metamaterials


http://m.iopscience.iop.org/0953-4075/46/15/155401?v_showaffiliations=yes

H Dong1, C Conti2, A Marini1 and F Biancalana1,3
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Fabio.Biancalana@mpl.mpg.de
1 Max Planck Institute for the Science of Light, Guenther-Scharowsky-Straße 1, D-91058 Erlangen, Germany
2 Department of Physics, University Sapienza, Piazzale Aldo Moro 5, I-00185 Rome, Italy
3 School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UAs


We propose an electrically tunable graphene-based metamaterial that shows a large nonlinear optical response at THz frequencies. The responsible nonlinearity comes from the intraband current, which we are able to calculate analytically. We demonstrate that the proposed metamaterial supports stable 2D spatial solitary waves. Our theoretical approach is not restricted to graphene, but can be applied to all materials exhibiting a conical dispersion supporting massless Dirac fermions.

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