Title :
Observation of two emission lines in the p-type-Ge cyclotron resonance laser
Author :
Heiss, W. ; Unterrainer, Karl ; Gornik, Erich
Author_Institution :
Inst. fur Festkorperelektronik, Tech. Univ. Wien, Austria
fDate :
12/1/1994 12:00:00 AM
Abstract :
The stimulated far infrared emission of a p-type-Ge cyclotron resonance laser is investigated in the frequency range between 60 cm-1 and 80 cm-1. If the applied electric field is adjusted to achieve maximum output intensities, a single magnetic field tunable emission line is observed. By detuning the electric field a second line occurs in the laser spectrum. The presence of this line is governed by the amount of mixing between the Landau levels of the light and heavy holes induced by the electric field. From a comparison of the observed emission frequencies with calculated transition energies, a second laser transition is identified which appears in addition to the dominant n=1 to n=0 Landau level transition of the b-set
Keywords :
Landau levels; cyclotron resonance; elemental semiconductors; germanium; infrared sources; laser theory; laser transitions; laser tuning; population inversion; semiconductor lasers; stimulated emission; Ge; Landau level transition; Landau levels; applied electric field; calculated transition energies; detuning; electric field; emission lines; frequency range; heavy holes; laser spectrum; laser transition; light holes; maximum output intensities; observed emission frequencies; p-type-Ge cyclotron resonance laser; single magnetic field tunable emission line; stimulated far infrared emission; Chromium; Cyclotrons; Frequency; Laser transitions; Magnetic field measurement; Magnetic fields; Magnetic resonance; Optical mixing; Stimulated emission; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
