Abstract
We have obtained analytic results for the surface states of three-dimensional topological insulators in the presence of circularly polarized light. This electron–photon interaction results in an energy gap as well as a novel energy dispersion of the dressed electron–photon states, different from both graphene and the standard two-dimensional electron gas (2DEG). Additionally, we made calculations of the ballistic conductance and Klein tunneling in both two- and three-dimensional topological insulators as well as investigating how these phenomena are affected in the presence of circularly polarized light. We have found a critical energy for an incoming particle, separating two substantially different types of tunneling.
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