Electronics Letters · 2009 · 86 citations · 6 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsPhotonicsSemiconductor MaterialsLaser PhysicsPlasmonicsQuantum OptoelectronicsSemiconductor LasersTerahertz PhotonicsTerahertz SpectroscopyOhmic HeatingPhonon-phonon InteractionsPlasmonic WaveguidesQuantum Cascade LasersTerahertz Quantum Cascade LasersTerahertz Semiconductor DevicesTerahertz WaveguidesThreshold Current Reduction
A report is presented on GaAs/(Al,Ga)As terahertz (THz) quantum-cascade lasers (QCLs) based on alternating photon and longitudinal optical (LO) phonon-assisted transitions between quasi-minibands. The design is optimised for low threshold current densities and low operating voltages, resulting in reduced ohmic heating during continuous-wave (CW) operation. The QCLs exhibit lasing over a broad range of frequencies from 2.91 to 3.21 THz. Using single-plasmon waveguides, pulsed operation up to 114 K and CW operation up to 65 K has been achieved.
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Terahertz quantum-cascade lasers
Benjamin S. Williams · Nature Photonics · 2007 · 1.5K citations
Terahertz quantum cascade laser as local oscillator in a heterodyne receiver
H.-W. Hübers, S. G. Pavlov, A. D. Semenov et al. · Optics Express · 2005 · 155 citations · Full text