The far infrared p-Ge laser: transition identification and evidence for streaming motion

C. R. Pidgeon

doi:10.1117/12.2298530

30 August 1993 The far infrared p-Ge laser: transition identification and evidence for streaming motion

C. R. Pidgeon

Proceedings Volume 2104, 18th International Conference on Infrared and Millimeter Waves; 21042Q (1993) https://doi.org/10.1117/12.2298530
Event: 18th International Conference on Infrared and Millimeter Waves, 1993, Colchester, United Kingdom

Abstract

Crossed electric and magnetic fields applied to p-Ge crystals can lead to stimulated FIRemission between different light hole Landau levels. "Streaming motion" of heavy holes, where theyrepeatedly accelerate collissionless to the optical phonon energy and scatter back to the origin [1] isthought to be one of the main processes underlying the so-called p-Ge cyclotron resonance (CR) laser.The finite probability for heavy holes to scatter into light hole Landau levels (LL's) leads in this way toan increase of the population of light hole LL's (pumping mechanism). A population inversion betweendifferent LL's is built up due to the depopulation of low lying LL's by ionised impurity scattering [2] ordue to mixing between light and heavy hole states (3], which, because of streaming motion of the heavyholes, leads to a reduction of the lower LL lifetime.

Citation Download Citation

C. R. Pidgeon "The far infrared p-Ge laser: transition identification and evidence for streaming motion", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21042Q (30 August 1993); https://doi.org/10.1117/12.2298530

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