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Giant optical nonlinearity of graphene in a strong magnetic field
Xianghan Yao1, Alexey Belyanin
1Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
Abstract:
We calculate the nonlinear optical response of graphene in strong magnetic and optical fields, using a quantum-mechanical density-matrix formalism. We show that graphene in a magnetic field possesses a giant mid- or far-infrared optical nonlinearity, perhaps the highest among known materials. The high nonlinearity originates from unique electronic properties and selection rules near the Dirac point. As a result, even one monolayer of graphene gives rise to an appreciable nonlinear frequency conversion efficiency for incident infrared radiation.
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