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Electron-phonon relaxation rates and optical gain in a quantum cascade laser in a magnetic field

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Figure

Fig. 1. The layer widths are 56, 19, 11, 58, 11, 49, and 28 Å,going from the emitter towards the collector barrier, and theelectric field is 44 kV/cm
FIG. 2. The total electron relaxation rate due to emission of optical andacoustic phonons as a function of magnetic field, for transitions from thestate �3,0� into LLs belonging to the two lower subbands.
FIG. 6. Positions of relevant discrete states in the structure for the magneticfield of B=24.5 T.

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