Impact of nonequilibrium phonons on the electron dynamics in terahertz quantum cascade lasers (Articolo in rivista)

Type
Label
  • Impact of nonequilibrium phonons on the electron dynamics in terahertz quantum cascade lasers (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Iotti R.C., Rossi F., Vitiello M.S., Scamarcio G., Mahler L. and Tredicucci A. (2010)
    Impact of nonequilibrium phonons on the electron dynamics in terahertz quantum cascade lasers
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Iotti R.C., Rossi F., Vitiello M.S., Scamarcio G., Mahler L. and Tredicucci A. (literal)
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  • 97 (literal)
Rivista
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  • Issue: 3 Article Number: 033110 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • 1. Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy (Iotti R.C., Rossi F.) 2. Univ Bari Aldo Moro, CNR, Ist Foton & Nanotecnol, I-70126 Bari, Italy (Vitiello M.S., Scamarcio G.) 3. Univ Bari Aldo Moro, Dept Fis, I-70126 Bari, Italy (Vitiello M.S. Scamarcio G.) 4. INFM, NEST CNR, I-56126 Pisa, Italy (Mahler L., Tredicucci A.) 5. Scuola Normale Super Pisa, I-56126 Pisa, Italy (Mahler L., Tredicucci A.) (literal)
Titolo
  • Impact of nonequilibrium phonons on the electron dynamics in terahertz quantum cascade lasers (literal)
Abstract
  • In this paper we investigate, both theoretically and experimentally, nonequilibrium electron and phonon effects in quantum-cascade devices. In particular, we have developed a Monte Carlo-based global kinetic approach describing the complete interacting electronic subsystem (i.e., the full set of active-region and injector subbands) coupled to out-of-equilibrium longitudinal polar-optical (LO) phonons, which in turn will decay anharmonically into thermalized acoustic modes. Simulated results obtained for a prototypical terahertz emitting device show a very good agreement with measured data, evidencing how the nonequilibrium LO phonon population affects the electro-optical device performances. The latter may be qualitatively reproduced in terms of a global effective temperature of the heated phononic system. (C) 2010 American Institute of Physics. [doi:10.1063/1.3464977] (literal)
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