OBSERVATION OF 2 EMISSION-LINES IN THE P-TYPE GE CYCLOTRON-RESONANCE LASER

The stimulated far infrared emission of a p-type-Ge cyclotron resonanc e laser is investigated in the frequency range between 60 cm(-1) and 8 0 cm(-1) If the applied electric field is adjusted to achieve maximum output intensities, a single magnetic field tunable emission line is o bserved, By detuning the electric field a second line occurs in the la ser spectrum, The presence of this line is governed by the amount of m ixing between the Landau levels of the light and heavy holes induced b y the electric field, From a comparison of the observed emission frequ encies 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.