Charge Carrier Transport in Quantum Cascade Lasers in Strong Magnetic Field

Abstract

in generating optimal structures which emit radiation at specified wavelengths corresponding to absorption fingerprints of particular harmful pollutants found in the atmosphere. We also illustrate another interesting prospective application of quantum cascade laser-type structures: the design of metamaterials with tunable complex permittivity, based on amplification via intersubband transitions. In this case, the role of the magnetic field is to assist the attainment of sucient optical gain (population inversion), necessary to eectively manipulate the permittivity and fulfill the conditions for negative refraction (left-handedness).