Terahertz quantum cascade lasers |
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Authors: | Faist Jérôme Ajili Lassaad Scalari Giacomo Giovannini Marcella Beck Mattias Rochat Michel Beere Harvey Davies A Giles Linfield Edmund H Ritchie David |
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Affiliation: | Institute of Physics, University of Neuchatel, 2000 Neuchatel, Switzerland. jerome.faist@unine.ch |
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Abstract: | Recent developments in terahertz quantum cascade lasers are reviewed. Structures operating from a wavelength of lambda = 66 microm down to lambda = 87 microm are demonstrated. These devices used either a three-quantum-well chirped-superlattice active region or an active region based on a bound-to-continuum transition. The comparison between structures grown in a waveguide based on a single interface plasmon and a buried contact and (non-lasing) structures using a double plasmon waveguide demonstrates the importance of waveguide design on the operation of such devices. Continuous-wave operation up to a maximum temperature of 55 K with up to 15 mW output power at 10 K was demonstrated. |
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