Abstract
We study coherent optics in topological insulator surface states with broken time-reversal symmetry and develop a theory for the dynamical Hall effect driven by an intense electromagnetic field. The influence of the optical Stark effect enters as a nonlinear dependence on the optical field in the resulting Faraday and Kerr rotations. This nonlinear correction is found to decrease with the strength of the a.c. electric field, whereas exhibits a nonmonotonic behavior. We also discuss the effects of relaxation and dephasing on the Hall and magneto-optical responses when the frequency detuning is comparable to the inverse lifetime of the conduction electrons.
3 More- Received 26 May 2016
- Revised 17 July 2016
DOI:https://doi.org/10.1103/PhysRevB.94.125430
©2016 American Physical Society