NARROW-BAND TUNABLE SUBMILLIMETER HOT HOLE INJECTIONLESS SEMICONDUCTOR-LASER AND ITS USE FOR CYCLOTRON-RESONANCE INVESTIGATION

A narrowband far-infrared laser on intersubband transitions of hot holes was constructed and investigated. Two methods were used: mode selection due to intercavity Fabry-Perot resonator and selection of a narrow spectral lasing region by special multilayer mirror. The emission spectra of the laser were determined. The radiation bandwidth measured was Delta nu less than or equal to 0.2cm(-1) as compared with Delta nu similar or equal to 15-30 cm(-1) for nonselective resonator. Lasing with selective resonator could occur at any two wavelengths in the ranges 80-120 and 150-200 mu m. The wavelength was modified by altering electric and magnetic fields. The radiation power was about 10 W and of the same kind as that of a laser without a mode selector. The narrowband laser was used in investigation of CR of electrons in n-lnSb.