First-principles study of the terahertz third-order nonlinear response of metallic armchair graphene nanoribbons
arXiv:1603.06027 · doi:10.1103/PhysRevB.93.235430
Abstract
We compute the terahertz third-order nonlinear conductance of metallic armchair graphene nanoribbons using time-dependent perturbation theory. Significant enhancement of the intrinsic third-order conductance over the result for instrinsic 2D single-layer graphene is observed over a wide range of temperatures. We also investigate the nonlinear response of extrinsic metallic acGNR with |E_F|<<200 meV. We find that the third-order conductance exhibits a strong Fermi level dependence at low temperatures. A third-order critical field strength of between 1 and 5 kV/m is computed for the Kerr conductance as a function of temperature. For the third-harmonic conductance, the minimum critical field is computed to be about about 5 kV/m.
arXiv comment36 pages, 8 figures
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- First-principles study of ultrafast and nonlinear optical properties of graphite thin films
- Electric field induced injection and shift currents in zigzag graphene nanoribbons
- Quantum Size Effects in the Terahertz Nonlinear Response of Metallic Armchair Graphene Nanoribbons