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arXiv · 1610.04854

Theory of plasmonic effects in nonlinear optics: the case of graphene

Habib Rostami·Mikhail I. Katsnelson·Marco Polini
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Abstract

We develop a microscopic large-$N$ theory of electron-electron interaction corrections to multi-legged Feynman diagrams describing second- and third-order nonlinear response functions. Our theory, which reduces to the well-known random phase approximation in the linear-response limit, is completely general and is useful to understand all second- and third-order nonlinear effects, including harmonic generation, wave mixing, and photon drag. We apply our theoretical framework to the case of graphene, by carrying out microscopic calculations of the second- and third-order nonlinear response functions of an interacting two-dimensional (2D) gas of massless Dirac fermions. We compare our results with recent measurements, where all-optical launching of graphene plasmons has been achieved by virtue of the finiteness of the quasi-homogeneous second-order nonlinear response of this inversion-symmetric 2D material.

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Habib Rostami, Mikhail I. Katsnelson, Marco Polini. 2016-10-16. Theory of plasmonic effects in nonlinear optics: the case of graphene. https://doi.org/10.1103/physrevb.95.035416

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