Abstract
One of the top priorities in the development of quantum cascade laser sources is the optimization ofthe heat transport dynamic. We review here our experimental studies on the thermal properties of state ofart quantum cascade lasers operating both in the mid-IR and THz ranges. The experimental approach isbased on the investigation of the band-to-band photoluminescence signals, collected during device continu-ous wave operation. We measured the lattice temperature profile on the device front facet and using thesedata as inputs, we extract the heat dissipation patterns, the in-plane and the cross-plane active region thermalconductivitiesandthethermalboundaryresistanceforquantumcascadelasersbasedondifferentmaterialsystems.PACSnumbers:61.46.–w,61.82.Fk,68.35.Ct
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