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Time-resolved measurement of the local lattice temperature in terahertz quantum cascade lasers (Articolo in rivista)
- Type
- Label
- Time-resolved measurement of the local lattice temperature in terahertz quantum cascade lasers (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Vitiello, MS; Scamarcio, G; Spagnolo, V (2008)
Time-resolved measurement of the local lattice temperature in terahertz quantum cascade lasers
in Applied physics letters
(literal)
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- Vitiello, MS; Scamarcio, G; Spagnolo, V (literal)
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- Rivista
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- ISI Web of Science (WOS) (literal)
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- \"[Vitiello, Miriam S.; Scamarcio, Gaetano] Univ Bari, CNR, INFM, Reg Lab LIT3, I-70126 Bari, Italy; [Vitiello, Miriam S.; Scamarcio, Gaetano] Univ Bari, Dipartimento Interateneo Fis M Merlin, I-70126 Bari, Italy; [Spagnolo, Vincenzo] Politecn Bari, Dipartimento Interateneo Fis M Merlin, I-70126 Bari, Italy; [Spagnolo, Vincenzo] Politecn Bari, CNR, INFM, Reg Lab LIT3, I-70126 Bari, Italy (literal)
- Titolo
- Time-resolved measurement of the local lattice temperature in terahertz quantum cascade lasers (literal)
- Abstract
- We measured the time dependence of the local lattice temperature in terahertz quantum cascade lasers with surface plasmon waveguides. The time constants for heat extraction from the active region (0.15-0.29 mu s) are approximately ten times shorter than those associated with heat extraction from the substrate, thereby showing the dominant role of the substrate-heat sink coupling. Thermal diffusivities D=0.052 cm(2)/s (D-s=3.9 cm(2)/s) and thermal diffusion lengths mu=1.2 mu m (mu(s)=31 mu m) in the active region (substrate) have been extracted by fitting the solution of the heat transport equation to the experimental data. (C) 2008 American Institute of Physics. (literal)
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