title: Coherent destruction of tunneling in graphene irradiated by elliptically polarized lasers.
abstract: Photo-induced transition probabilities in graphene are studied theoretically from the viewpoint of Floquet theory. Conduction band populations are computed for a strongly, periodically driven graphene sheet under linear, circular, and elliptic polarization. Features of the momentum spectrum of excited quasi-particles can be directly related to the avoided crossing of the Floquet quasi-energy levels. In particular, the impact of the ellipticity and the strength of the laser excitation on the avoided crossing structure-and on the resulting transition probabilities-is studied. It is shown that the ellipticity provides an additional control parameter over the phenomenon of coherent destruction of tunneling in graphene, allowing one to selectively suppress multiphoton resonances.
authors.affiliation: Université du Québec, INRS-Énergie, Matériaux et Télécommunications, Varennes, Québec, J3X 1S2, Canada. Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
authors.forename: Denis
authors.initials: D
authors.lastname: Gagnon
authors.forename: François
authors.initials: F
authors.lastname: Fillion-Gourdeau
authors.forename: Joey
authors.initials: J
authors.lastname: Dumont
authors.forename: Catherine
authors.initials: C
authors.lastname: Lefebvre
authors.forename: Steve
authors.initials: S
authors.lastname: MacLean