Improved waveguide designs for 9.0μm GaAs-based quantum cascade laser (QCL) structures are presented. Modal losses and confinement factors are calculated for TM modes with the transfer matrix method (TMM) and eff...
Room temperature operation is an important criterion for high performance of quantum cascade lasers. A strain-compensated quantum cascade laser(λ≈5.5μm) with optimized waveguide structure lasing at room temperatu...