2010/07/22 by Jiangtao Liu, Jiang-Tao Liu, Fuhai Su +3 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Electron #Graphene #Graphene research and applications #Group delay and phase delay #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum optics and atomic interactions #Quantum tunnelling #Wave packet #cond-mat.mes-hall #cond-mat.other
paper · pdf · doi:10.1088/1367-2630/14/1/013012
published as New Journal of Physics 14 (2012) 013012 · 4 pages, 3 figures
arxiv created 2010/07/22 · openalex publication_date 2012/01/10 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.