The strong coupling of light with magnetoexcitons in a quantum well within a semiconductor microcavity under the action of an electric field parallel to the quantum well plane, is theoretically studied. Such a phenomenon is described within the Stahl–Balslev real-space density-matrix approach using a system of coupled equations for the coherent-wave amplitude and the electromagnetic fields. In the study, both s- and p-polarization geometries as well as the Coulomb interaction potential between electrons and holes are considered. It is shown that the optical reflectivity spectra for a heterostructure, having an InGaAs/GaAs quantum well inside the semiconductor microcavity with Bragg mirrors of alternating GaAs and InGaAs layers, exhibit well-discernible resonant dips. The strong magnetoexciton–photon coupling occurs when the magnetoexciton resonance frequency and that of the confined photon are close to each other. The application of a static electric field, parallel to the interfaces of the layers, allows for the optical excitation of magnetoexcitons, having nonzero angular momentum projection, and noticeably alters the resonance structure of both s- and p-polarization optical spectra. The strong magnetoexciton–photon coupling is observed until sufficiently large magnitudes of the applied parallel electric field are reached.

From a macroscopic point of view, the edges of a type II superconductor are degraded non-homogeneous regions compared with the bulk of the sample. This paper presents numerical simulations of a long superconducting bar with square cross section subjected to an axial external magnetic field, the edges effect on its electromagnetic properties is studied. The edges of the sample are modeled as finite width regions with lower critical current density than the rest of the material. The simulations are based on a continuum electrodynamics model which describes the magnetic induction dynamics of partially penetrated states. Unlike a simpler homogeneous superconductor, in an inhomogeneous material rough flux fronts are formed. It was established that the stochastic profile of the current density produces jets of magnetic flux near a macrodefect.

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