Design, fabrication and optical characterization of quantum cascade lasers at terahertz frequencies using photonic crystal reflectors.
We designed, fabricated and characterised electrically injected quantum cascade lasers with photonic crystal reflectors emitting at terahertz frequencies (3.75 THz). These in-plane emitting structures display typical threshold current densities of 420 A/cm2 and output powers of up to 2 mW under pulsed excitation. The emission characteristics are shown to be robust, as with increasing current the emission remains singlemode with no drift in wavelength, this results from the narrow reflectivity band of the photonic crystal reflectors.
Dunbar
L Andrea
LA
Moreau
Virginie
V
Ferrini
Rolando
R
Houdré
Romuald
R
Sirigu
Lorenzo
L
Scalari
Giacomo
G
Giovannini
Marcella
M
Hoyler
Nicolas
N
Faist
Jérôme
J