Applied Physics Letters · 2001 · 141 citations · 11 references
EngineeringElectrical EngineeringPhysicsOptoelectronicsPhotonicsSemiconductor DevicesHigh-frequency Semiconductor DevicesLaser DiodesLaser PhysicsQuantum WellsSemiconductor LasersSemiconductor PhysicsCarrier DynamicsFrequency ModulationHigh-speed OperationIntersubband TransitionsModulation ResponseQuantum Cascade LasersQuantum Well LasersRelaxation Oscillations
Quantum cascade (QC) lasers, based on intersubband transitions in semiconductor quantum wells, are characterized by ultrafast (picosecond) carrier lifetimes. An important consequence of this unique property is the expected absence of relaxation oscillations in the transient response of these devices. Here, we discuss and experimentally verify this prediction by measuring the modulation response of several 8-μm-QC lasers, properly processed and packaged for high-speed operation, up to 10 GHz.
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Jérôme Faist, Federico Capasso, Deborah L. Sivco et al. · Science · 1994 · 4.5K citations
Self-Mode-Locking of Quantum Cascade Lasers with Giant Ultrafast Optical Nonlinearities
Roberto Paiella, Federico Capasso, Claire Gmachl et al. · Science · 2000 · 166 citations