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We present a detailed investigation of the effects that optical-phonon confinement has on the electronic transport properties of GaAs-based midinfrared multiple-quantum-well MQW quantum cascade lasers QCLs . The macroscopic dielectric continuum model is used to describe the interface IF and confined CF optical phonon modes. Dispersions of the IF modes are(More)
We present the design and optimization of a deep-well GaAs-based quantum cascade laser (QCL) emitting at 6.7 μm, the shortest wavelength in GaAs-based QCLs, using a multivalley Monte Carlo simulation. The simulation is performed self-consistently with the design process. The optimized structure exhibits sufficient gain to achieve lasing at both 77 K(More)
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