Title

Effect of asymmetry on nonlinear optical response in graphene

RIS ID

92698

Publication Details

Cao, W. H. & Ang, Y. Sin. (2014). Effect of asymmetry on nonlinear optical response in graphene. Europhysics Letters: a letters journal exploring the frontiers of physics, 107 (3), 37007-2-37007-5.

Abstract

We show that a slight asymmetry in the wave function of graphene can result in a significant enhancement of the nonlinear effect on the optical response. The third-order nonlinear current due to asymmetry modification of the wave function increases with kFa, where kF is the Fermi eigenvector and a is the lattice constant. The effect of asymmetry can significantly enhance the third-order current at low temperature and at large Fermi energies. For kFa around 1, the nonlinear current increases by around 40% at low temperatures.

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Link to publisher version (DOI)

http://dx.doi.org/10.1209/0295-5075/107/37007