Optical field modulation on the group delay of chiral tunneling in graphene

Details Optical field modulation on the group delay of chiral tunneling in graphene Optical field modulation on the group delay of chiral tunneling in graphene

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012njph...14a3012l&link_type=abstract

New Journal of Physics, Volume 14, Issue 1, pp. 013012 (2012).

Physics

Scientific paper

The influences of optical fields on the group delay of chiral tunneling in graphene are investigated in real time using the finite-difference time-domain method. The group delay of tunneling 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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