Room-temperature mid-IR semiconductor lasers

Summary form only given. Here we present results for a short-wavelength type II quantum well laser (T2QWL) structure which exhibits lasing up to temperatures well above ambient. Until now, only the intersubband-based quantum cascade laser had displayed stimulated emission at 3 /spl mu/m above 300 K. An undoped InAs-GaInSb-InAs-AlSb MQW wafer was grown by MBE.