Nonlinear properties of gated graphene in a strong electromagnetic field

Journal Article · Wed Mar 15 00:00:00 EDT 2017 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778817020041· OSTI ID:22613986

Avetisyan, A. A., E-mail: [e-mail]; Djotyan, A. P., E-mail: [e-mail] ^[1]; Moulopoulos, K., E-mail: [e-mail] ^[2]

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1. Yerevan State University, Department of Physics (Armenia)
2. University of Cyprus, Department of Physics (Cyprus)

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.

• OSTI ID: 22613986
• Journal Information: Physics of Atomic Nuclei, Vol. 80, Issue 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
DENSITY MATRIX
ELECTROMAGNETIC FIELDS
ELECTRONS
ENERGY GAP
GRAPHENE
HAMILTONIANS
KINETIC EQUATIONS
LASER RADIATION
NONLINEAR PROBLEMS
PHOTONS
QUANTUM MECHANICS
VALENCE