Bound Electron Transitions under the Influence of Electromagnetic Wave in Constant Magnetic Field

Abstract

Motion and radiative transitions of an electron in a magnetic field under the influence of an external electromagnetic wave are studied for various confining conditions in semiconductor, graphene, in quantum wells, and relativistic generalization in terms of the Klein–Gordon equation are considered. In particular, the following problems are discussed. The so-called cyclotron resonance, which may appear in graphene, is studied with indication for appearance of the so-called frequency-halving. The problem is solved for two-dimensional massless charged particle, whose gapless nature is protected by sublattice symmetry. The exact classical calculation of this effect is undertaken in the framework of a 2D classical equation for a zero-mass electron. We also find an exact solution of the Schrödinger equation for charge carriers in semiconductors under the influence of an external magnetic field and in the field of electromagnetic wave with an account for their radiative transitions. Solutions of the relativistic Klein–Gordon equation in this configuration of electromagnetic fields are found as a certain generalization of the results obtained for the non-relativistic case. These results may serve as a first step for further efforts to find exact solutions of wave equations for quasiparticles in solid state structures in external fields.

Spectral-angular characteristics of the radiation of a charged particle in the Redmond field

“…However, as it is known from the Lawson−Woodward theorem, a particle in the unlimited vacuum space without static component of electric or magnetic field can not absorb the energy from laser pulse, no matter how strong is the pulse [5]. The issue of particle oscillation in a combination of a plane electromagnetic wave (EMW) field and a constant magnetic field was investigated for the first time in [6] and remains in the focus of researchers up to now in the point of view of classical and quantum theories [7][8][9][10][11][12][13][14][15][16]. Results of these studies are of special interests, because the problem formulated in them corresponds to real technical systems.…”