The local temperature of quantum-cascade lasers operating in continuous wave mode is reported. This information is extracted from the thermal shift of the band-to-band photoluminescence peaks in the AlInAs and InP cladding layers of quantum-cascade laser facets using a high-resolution microprobe setup. Interpolation by means of a two-dimensional heat diffusion model allows to obtain the temperature profile and the thermal conductivity in the waveguide core. Comparison between substrate and epilayer-side mounted lasers shows the superior thermal dissipation capability of the latter, and explains their better performance with respect to threshold current and maximum operating temperature.

Temperature profile of GaInAs/AlInAs/InP quantum cascade-laser facets measured by microprobe photoluminescence / Spagnolo, V.; Troccoli, M.; Scamarcio, G.; Gmachl, C.; Capasso, F.; Tredicucci, A.; Sergent, A. M.; Hutchinson, A. L.; Sivco, D. L.; Cho, A. Y.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 78:15(2001), pp. 2095-2097. [10.1063/1.1359146]

Temperature profile of GaInAs/AlInAs/InP quantum cascade-laser facets measured by microprobe photoluminescence

Spagnolo, V.;
2001-01-01

Abstract

The local temperature of quantum-cascade lasers operating in continuous wave mode is reported. This information is extracted from the thermal shift of the band-to-band photoluminescence peaks in the AlInAs and InP cladding layers of quantum-cascade laser facets using a high-resolution microprobe setup. Interpolation by means of a two-dimensional heat diffusion model allows to obtain the temperature profile and the thermal conductivity in the waveguide core. Comparison between substrate and epilayer-side mounted lasers shows the superior thermal dissipation capability of the latter, and explains their better performance with respect to threshold current and maximum operating temperature.
2001
Temperature profile of GaInAs/AlInAs/InP quantum cascade-laser facets measured by microprobe photoluminescence / Spagnolo, V.; Troccoli, M.; Scamarcio, G.; Gmachl, C.; Capasso, F.; Tredicucci, A.; Sergent, A. M.; Hutchinson, A. L.; Sivco, D. L.; Cho, A. Y.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 78:15(2001), pp. 2095-2097. [10.1063/1.1359146]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/4411
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