1203.5195 (François-Régis Jasnot et al.)

Direct surface cyclotron resonance terahertz emission from a quantum
cascade structure    [PDF]

François-Régis Jasnot, Louis-Anne De Vaulchier, Yves Guldner, Gérald Bastard, Angela Vasanelli, Christophe Manquest, Carlo Sirtori, Mattias Beck, Jérôme Faist

A strong magnetic field applied along the growth direction of a semiconductor quantum well gives rise to a spectrum of discrete energy states, the Landau levels. By combining quantum engineering of a quantum cascade structure with a static magnetic field, we can selectively inject electrons into the excited Landau level of a quantum well and realize a tunable surface emitting device based on cyclotron emission. By applying the appropriate magnetic field between 0 and 12 T, we demonstrate emission from a single device over a wide range of frequencies (1-2 THz and 3-5 THz).

View original: http://arxiv.org/abs/1203.5195