Magnetic Field Dependence of Laser Emission inPb1−XSnXSeDiodes

Abstract

The magnetic field dependence of long-wavelength infared laser emission has been studied in ${\mathrm{Pb}}_{1-X}{\mathrm{Sn}}_X\mathrm{Se}$ diodes for compositions in the range $0<~x<~0.3$. For $x>\mathrm{}0.15\mathrm{}$ the energy of the lowest transition decreases with increasing magnetic field whereas for $x<\mathrm{}0.15\mathrm{}$ this energy increases. This unique observation is consistent with a theory of magnetic energy levels proposed by Baraff and also strongly supports the inversion model for the energy bands in Pb-Sn chalcogenides.