We measured the thermal resistance R=20.1 K/W and the electrical power dependence of the electronic temperature Re=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 50 times lower than THz QCLs with resonant-phonon active region scheme.
Electron lattice coupling in bound-to-continuum THz quantum cascade lasers
SCAMARCIO, Gaetano;
2006-01-01
Abstract
We measured the thermal resistance R=20.1 K/W and the electrical power dependence of the electronic temperature Re=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 50 times lower than THz QCLs with resonant-phonon active region scheme.File in questo prodotto:
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