title: Design, fabrication and optical characterization of quantum cascade lasers at terahertz frequencies using photonic crystal reflectors.
abstract: 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.
authors.forename: L Andrea
authors.initials: LA
authors.lastname: Dunbar
authors.forename: Virginie
authors.initials: V
authors.lastname: Moreau
authors.forename: Rolando
authors.initials: R
authors.lastname: Ferrini
authors.forename: Romuald
authors.initials: R
authors.lastname: Houdré
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Sirigu
authors.forename: Giacomo
authors.initials: G
authors.lastname: Scalari
authors.forename: Marcella
authors.initials: M
authors.lastname: Giovannini
authors.forename: Nicolas
authors.initials: N
authors.lastname: Hoyler
authors.forename: Jérôme
authors.initials: J
authors.lastname: Faist