1 October 1991 Investigation of the pumping mechanism of the p-GE cyclotron resonance laser
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15762F (1991) https://doi.org/10.1117/12.2297800
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
An Inversion between Landau levels (LL's) of the light hole (lh) subband of germanium is achieved when the crystal is subjected to crossed electric and magnetic fields /1,2/. This leads to stimulated far infrared (FIR) emission at the cyclotron resonance (CR) frequency. The emission spectrum consists of a single line linearly tunable with magnetic field /3/. Lasing was found to depend critically on the orientation of the electric and magnetic field with respect to the crystallographic axes. Characteristically the laser emission is observed in two field regimes - which we call here low field (1) and high field (2) - depending on conditions of sample doping and external stress. In general, low concentration samples (NA − ND = 8 × 1012 cm-3) oscillate in region (1) giving frequencies between 30 cm-1 and 50 cm-1, and high concentration samples (NA − ND = 6 × 1013 cm-3) oscillate in region (2) with frequencies between 65 cm-1 and 85 cm-1. The latter samples howerver can be made to oscillate also in range (1) by applying uniaxial stress /4/.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. Kremser, C. Kremser, } "Investigation of the pumping mechanism of the p-GE cyclotron resonance laser", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15762F (1 October 1991); doi: 10.1117/12.2297800; https://doi.org/10.1117/12.2297800
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