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.
Autori interni: | |
Autori: | Vitiello, Ms; Scamarcio, G; Spagnolo, V; Losco, T; Green, Rp; Tredicucci, Alessandro; Beere, He; Ritchie, Da |
Titolo: | Electron-lattice coupling in bound-to-continuum THz quantum-cascade lasers |
Anno del prodotto: | 2006 |
Digital Object Identifier (DOI): | 10.1063/1.2211301 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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