The influence of the optical Stark effect on chiral tunneling in graphene
Jiang-Tao Liu, Fu-Hai Su, Hai Wang, and Xin-Hua Deng
TL;DR
This paper investigates how intense laser fields affect electron transport in graphene, revealing that the optical Stark effect breaks chiral symmetry and suppresses perfect chiral tunneling.
Contribution
It demonstrates the impact of the optical Stark effect on chiral tunneling in graphene using finite-difference time-domain simulations.
Findings
Chiral symmetry is broken by intense laser fields.
Perfect chiral tunneling is significantly suppressed.
The optical Stark effect causes band mixing in graphene.
Abstract
The influences of intense coherent laser fields on the transport properties of a single layer graphene are investigated by using the finite-difference time-domain method. Under an intense laser field, the valence band and conduction band states mix via the optical Stark effect. The chiral symmetry of Dirac electrons is broken and the perfect chiral tunneling is strongly suppressed.
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