Terahertz quantum cascade lasers.
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.
Institute of Physics, University of Neuchâtel, 2000 Neuchâtel, Switzerland. jerome.faist@unine.ch
Jérôme
J
Faist
Lassaad
L
Ajili
Giacomo
G
Scalari
Marcella
M
Giovannini
Mattias
M
Beck
Michel
M
Rochat
Harvey
H
Beere
A Giles
AG
Davies
Edmund H
EH
Linfield
David
D
Ritchie