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Experimental investigation of hot carriers in terahertz quantum cascade lasers (Articolo in rivista)
- Type
- Label
- Experimental investigation of hot carriers in terahertz quantum cascade lasers (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Scamarcio, G; Vitiello, MS; Spagnolo, V (2008)
Experimental investigation of hot carriers in terahertz quantum cascade lasers
in Acta Physica Polonica. A
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- Scamarcio, G; Vitiello, MS; Spagnolo, V (literal)
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- ISI Web of Science (WOS) (literal)
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- \"[Scamarcio, G.] Univ Bari, Dept Phys, INFM CNR Reg Lab LIT3, I-70126 Bari, Italy; [Spagnolo, V.] Politecn Bari, Dept Phys, INFM CNR Reg Lab LIT3, Bari, Italy (literal)
- Titolo
- Experimental investigation of hot carriers in terahertz quantum cascade lasers (literal)
- Abstract
- The nature of the electron distribution and the electron-lattice energy relaxation phenomena in all classes of quantum cascade lasers operating in the THz range, namely, resonant-phonon, bound-to-continuum, and interlaced photon-phonon designs are reviewed. Thermalized hot-electron distributions are found in all cases. However, electronic temperatures of individual conduction subband are strongly influenced by the specific quantum design and the actual electron-lattice energy relaxation channels. A wealth of information was obtained both below and above laser threshold from the analysis of micro-probe band-to-band photoluminescence spectra recorded with a spatial resolution of approximate to 2 mu m. The influence of the detailed knowledge of the hot electron distributions on the design of improved THz quantum cascade lasers aiming at high temperature operation will be discussed. (literal)
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