Applied Physics Letters · 2007 · 22 citations · 20 references
EngineeringElectrical EngineeringBiophotonicsOptoelectronicsPhotonicsLaser OpticsLaser PhysicsOptical SourcesPhotonic Integrated CircuitsQuantum OptoelectronicsSemiconductor LasersBeam DivergenceDistributed Feedback LasersDivergenceMetal-semiconductor InterfacesQuantum Cascade LasersQuantum Cascade StructuresSingle-mode OperationSingle-mode Semiconductor Lasers
By using a semiconductor/metal grating formed on the episide of a quantum-cascade structure, distributed feedback lasing has been achieved with beam emission through the substrate. Using short-pulse excitation (100ns, 16kHz), single-longitudinal-mode operation near 5.1μm is demonstrated over wide ranges in heatsink temperature and drive current. The beam divergence in the longitudinal direction at a distance 40cm away from the 2.5mm wide aperture is ∼0.5°.
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Distributed feedback quantum cascade lasers
Jérôme Faist, Claire Gmachl, Federico Capasso et al. · Applied Physics Letters · 1997 · 359 citations
High-sensitivity detection of TNT
Michael Pushkarsky, Ilya Dunayevskiy, Manu Prasanna et al. · Proceedings of the National Academy of Sciences · 2006 · 209 citations · Full text
Natural Sciences, Chemistry, Physics +16