Effects of optical fields on the tunneling time of chiral electrons in graphene

Details Effects of optical fields on the tunneling time of chiral electrons in graphene Effects of optical fields on the tunneling time of chiral electrons in graphene

2010-07-22

arxiv.org/abs/1007.3785v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

The influences of optical fields on the tunneling time in graphene are investigated in real time using the finite-difference time-domain method. The tunneling time of electrons irradiated by an optical field is significantly different from that observed in traditional quantum tunneling. We found that when the barrier width increases, the group delay becomes constant for the reflected wave packet, but increases linearly for the transmitted wave packet. This peculiar tunneling effect can be attributed to current leakage in a time-dependent barrier generated via the optical Stark effect.

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