Faculté des sciences

Terahertz intersubband emission in strong magnetic fields

Blaser, Stéphane ; Rochat, Michel ; Beck, Mattias ; Hofstetter, Daniel ; Faist, Jérôme

In: Applied Physics Letters, 2002, vol. 81, p. 67-69

Electroluminescence in quantum-cascade structures based on vertical transitions is studied in a strong perpendicular magnetic field in the limit in which the cyclotron energy is larger than the intersubband transition energy. Cyclotron emission and a luminescence intensity enhancement up to a factor of 6 is observed in GaAs/AlGaAs and InGaAs/InAlAs vertical transition-based quantum-cascade... Plus

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    Summary
    Electroluminescence in quantum-cascade structures based on vertical transitions is studied in a strong perpendicular magnetic field in the limit in which the cyclotron energy is larger than the intersubband transition energy. Cyclotron emission and a luminescence intensity enhancement up to a factor of 6 is observed in GaAs/AlGaAs and InGaAs/InAlAs vertical transition-based quantum-cascade structures.