Nonlinear properties of gated graphene in a strong electromagnetic field

We develop a microscopic theory of a strong electromagnetic field interaction with gated bilayer graphene. Quantum kinetic equations for density matrix are obtained using a tight binding approach within second quantized Hamiltonian in an intense laser field. We show that adiabatically changing the g...

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Bibliographic Details
Published in:Physics of atomic nuclei 2017-03, Vol.80 (2), p.307-314
Main Authors: Avetisyan, A. A., Djotyan, A. P., Moulopoulos, K.
Format: Article
Language:English
Subjects:
ABSORPTION
Analysis
ATOMIC AND MOLECULAR PHYSICS
Band theory
Bilayers
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Conduction bands
Density
DENSITY MATRIX
ELECTROMAGNETIC FIELDS
Electromagnetic radiation
Electron transport
ELECTRONS
Elementary Particles and Fields
ENERGY GAP
GRAPHENE
Graphite
HAMILTONIANS
KINETIC EQUATIONS
LASER RADIATION
NONLINEAR PROBLEMS
Particle and Nuclear Physics
PHOTONS
Physics
Physics and Astronomy
QUANTUM MECHANICS
Resonant photons
VALENCE
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Summary:We develop a microscopic theory of a strong electromagnetic field interaction with gated bilayer graphene. Quantum kinetic equations for density matrix are obtained using a tight binding approach within second quantized Hamiltonian in an intense laser field. We show that adiabatically changing the gate potentials with time may produce (at resonant photon energy) a full inversion of the electron population with high density between valence and conduction bands. In the linear regime, excitonic absorption of an electromagnetic radiation in a graphene monolayer with opened energy gap is also studied.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778817020041