We compare the thermal properties of THz quantum cascade lasers (QCLs) fabricated with metal-metal optical waveguides based on Au/Au or In/Au wafer bonding. This information was obtained from the analysis of microprobe band-to-band photoluminescence spectra measured on devices operating in continuous wave (cw). The experimental normalized thermal resistances (A L*), show that the use of Au/Au wafer bonding optimizes the heat dissipation. Comparison with surface-plasmon based THz QCLs, demonstrates that the use of metal-metal wafer bonding can allow cw operation at progressively higher temperatures.
Thermal properties of THz quantum cascade lasers based on different optical waveguide configurations / Vitiello, M. S.; Scamarcio, G.; Spagnolo, Vincenzo Luigi; Alton, J.; Barbieri, S.; Worrall, C.; Beere, H. E.; Ritchie, D. A.; Sirtori, C.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 89:2(2006). [10.1063/1.2220546]
Thermal properties of THz quantum cascade lasers based on different optical waveguide configurations
SPAGNOLO, Vincenzo Luigi;
2006-01-01
Abstract
We compare the thermal properties of THz quantum cascade lasers (QCLs) fabricated with metal-metal optical waveguides based on Au/Au or In/Au wafer bonding. This information was obtained from the analysis of microprobe band-to-band photoluminescence spectra measured on devices operating in continuous wave (cw). The experimental normalized thermal resistances (A L*), show that the use of Au/Au wafer bonding optimizes the heat dissipation. Comparison with surface-plasmon based THz QCLs, demonstrates that the use of metal-metal wafer bonding can allow cw operation at progressively higher temperatures.| File | Dimensione | Formato | |
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