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Temperature Dependence of Thermal Conductivity and Boundary Resistance in THz Quantum Cascade Lasers

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3 Author(s)
Vitiello, M.S. ; Univ. degli Studi di Bari, Bari ; Scamarcio, Gaetano ; Spagnolo, Vincenzo

We measured the lattice temperature distribution, the cross-plane thermal conductivity , and the thermal boundary resistance (TBR) of the As quantum cascade lasers (QCLs) operating at 2.83 THz in the heat sink temperature range 45-300 K. This information was extracted from the analysis of microprobe band-to-band photoluminescence in QCLs operating in continuous wave. Both and TBR decrease monotonically at increasing temperature, the main influence on arising from the high density of interfaces.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:14 ,  Issue: 2 )