We measured the thermal resistance (R=20.1 K/W) and the electrical power dependence of the electronic temperature (R-e=27.0 K/W) of THz quantum-cascade lasers (QCLs) with bound-to-continuum active region scheme in the lattice temperature range of 30-100 K. This information, obtained from the analysis of microprobe photoluminescence spectra for QCLs operating at 2.5 THz, gives an electron-lattice energy relaxation rate (0.1 ps(-1)) similar to 50 times lower than THz QCLs with resonant-phonon active region scheme.
Electron lattice coupling in bound-to-continuum THz quantum cascade lasers / Vitiello, M. S.; Scamarcio, G.; Spagnolo, Vincenzo Luigi; Losco, T.; Green, R. P.; Tredicucci, A.; Beere, H. E.; Ritchie, D. A.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 88:24(2006). [10.1063/1.2211301]
Electron lattice coupling in bound-to-continuum THz quantum cascade lasers
SPAGNOLO, Vincenzo Luigi;
2006-01-01
Abstract
We measured the thermal resistance (R=20.1 K/W) and the electrical power dependence of the electronic temperature (R-e=27.0 K/W) of THz quantum-cascade lasers (QCLs) with bound-to-continuum active region scheme in the lattice temperature range of 30-100 K. This information, obtained from the analysis of microprobe photoluminescence spectra for QCLs operating at 2.5 THz, gives an electron-lattice energy relaxation rate (0.1 ps(-1)) similar to 50 times lower than THz QCLs with resonant-phonon active region scheme.| File | Dimensione | Formato | |
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