V. Tamošiūnas, R. Zobl, G. Fasching, G. Strasser, K. Unterrianer, R. Colombelli, C. Gmachl, L.N. Pfiffer, K. West, F. Capasso
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We report on the influence of a quantizing magnetic field on a THz quantum cascade laser. The magnetic field splits the subbands into sets of discrete Landau levels, which reduces the phase space for scattering and relaxation. A dramatic enhancement of the laser performance is achieved.
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