2019/09/30 by Bouchaib Lemaalem, Lemaalem, Bouchaib, Miloud Mekkaoui +5
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum Physics (quant-ph) #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.48550/arxiv.1909.13744
12 pages, 6 figures, clarifications and references added. To appear in EPL
arxiv created 2020/02/11 · arxiv updated 2020/02/12
We study the Goos-Hänchen (GH) shifts for transmitted Dirac fermions in gapped graphene through a single barrier structure having a time periodic oscillating component. Our analysis shows that the GH shifts in transmission for central band l=0 and two first sidebands l=±1 change sign at the Dirac points E=V+lℏω. In particular the GH shifts inbtransmission exhibit enhanced peaks at each bound state associated with the single barrier when the incident angle is less than the critical angle associated with total reflection. Klein tunneling, reflected by perfect transmission at normal incidence, is also preserved in the presence of an oscillating barrier.