Far-infrared laser oscillation due to cyclotron emission in p-type germanium |
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| Authors: | Shinji Kuroda and Susumu Komiyama |
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| Affiliation: | (1) Department of Pure and Applied Sciences, University of Tokyo, Komaba 3-8-1, Meguro-ku, 153 Tokyo, Japan;(2) Present address: Institute of Materials Science, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan |
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| Abstract: | Far-infrared laser oscillation due to cyclotron emission in the light hole band of p-type germanium was observed under crossed electric and magnetic fields. The wavelength is inversely proportional to magnetic fields with a cyclotron mass ofmc=0.048mc. Numerical calculations based on Luttinger Hamiltonian show that mixing of wavefunctions between the light and heavy hole bands causes population inversion betweenn=0 andn=1 light-hole Landau levels. It is also shown that non-equidistant energy spacing of light-hole Landau levels is essential to yield net amplification. |
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