Investigation of the width of the emission line of single-frequency GaAlAs injection lasers

Abstract

PACS. 05.45 -Theory and models of chaotic systems.PACS. 46.30N -Fracture mechanics, fatigue, and cracks.PACS. 62.20M -Fatigue, brittleness, fracture, and cracks (inc. hardness).Abstract. -I consider an electron on a 2D lattice of arbitrary short-range scatterers in magnetic field. I accurately reduce its Schroedinger equation to an explicit Hermitian matrix. If the number 9 of magnetic-flux quanta per site is less than one, then = (1 -$)-th fraction of all states condenses into narrow high-density-of-states bands in the vicinity of Landau levels. Point scatterers shrink these bands into infinitely degenerate Landau levels. The states in the bands have high mobility in two and are extended in three dimensions. Magnetoresistance oscillates with magnetic field and may be non-monotonic with temperature and impurity concentration.