Applied Physics Letters · 2006 · 148 citations · 11 references
EngineeringElectrical EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsIntegrated OpticsIntegrated PhotonicsLaser PhysicsOptical ResonatorsOptical SourcesPhotonic Integrated CircuitsEmission SpectrumExternal-cavity LasersLaser TuningQuantum Cascade LasersQuantum Cascade StructuresSpontaneous EmissionTunable External-cavity LasersTunable Lasers
A heterogeneous quantum-cascade structure based on two bound-to-continuum designs emitting at 9.6 and 8.4μm is presented. Its spontaneous emission spectrum at room temperature has a full width at half maximum of 350cm−1 and shows a variation of intensity of less than 20% over more than 200cm−1. External cavity lasers using a grating in Littrow configuration and antireflection coated chips with this active region could be tuned over 265cm−1 from 8.2to10.4μm, that is, over 24% of the center wavelength.
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Ultra-broadband semiconductor laser
Claire Gmachl, Deborah L. Sivco, R. Colombelli et al. · Nature · 2002 · 258 citations
Quantum-cascade lasers based on a bound-to-continuum transition
Jérôme Faist, Mattias Beck, T. Aellen et al. · Applied Physics Letters · 2001 · 255 citations