Optical conductivity of disordered graphene beyond the Dirac cone approximation

Dynamical polarizability of graphene beyond the Dirac cone approximation

T. Stauber,1,2 J. Schliemann,3 and N. M. R. Peres1 1Centro de Física e Departamento de Física, Universidade do Minho, P-4710-057 Braga, Portugal 2Depto. de Física de la Materia Condensada, Universidad Autǿnoma de Madrid, E-28049 Madrid, Spain 3Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany Received 7 October 2009; revised manuscript received 16 December...

Polarization of graphene in a strong magnetic field beyond the Dirac cone approximation

Drude Conductivity of Dirac Fermions in Graphene

Jason Horng,1 Chi-Fan Chen,1 Baisong Geng,1 Caglar Girit,1 Yuanbo Zhang,2 Zhao Hao,3,4 Hans A. Bechtel,3 Michael Martin,3 Alex Zettl,1,5 Michael F. Crommie,1,5 Y. Ron Shen,1,5 and Feng Wang1,5,* 1Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA 2Department of Physics, Fudan University, Shanghai 200433, China 3Advanced Light Source Division, Lawrence B...

Measurement of the optical conductivity of graphene.

Optical reflectivity and transmission measurements over photon energies between 0.2 and 1.2 eV were performed on single-crystal graphene samples on a SiO2 substrate. For photon energies above 0.5 eV, graphene yielded a spectrally flat optical absorbance of (2.3+/-0.2)%. This result is in agreement with a constant absorbance of pialpha, or a sheet conductivity of pie2/2h, predicted within a mode...

Transmission Properties of the Periodic Structures Based on Graphene Nonlinear Optical Conductivity in a Terahertz Field

By developing the terahertz (THz) technology, in addition to generators and detectors of THz waves, the existence of some tools such as modulators and filters are needed. THz filters are important tools for various applications in the field of chemical and biological sensors. Linear and nonlinear optical properties of the graphene have attracted lots of attention. In fact graphene exhibits vari...