Terahertz injection lasers based on PbSnSe alloy with an emission wavelength up to 46.5 μm

Abstract

Diffusion injection lasers based on Pb_{1 – x}Sn_xSe alloy, emitting in a wide spectral range of 10–46.5 μm depending on the composition and temperatures are fabricated. A technology for growing high-quality single crystals from the vapor phase under conditions of free growth is developed. The dependences of the total emission intensity on the pump current and the emission spectra of injection lasers based on Pb_{1 – x}Sn_xSe are studied. In these samples, lasing of long-wavelength radiation to a record wavelength of 46.5 μm is achieved.