We review and discuss the first fully three-dimensional study of non-equilibrium carrier dynamics governing semiconductor-based intersubband optoelectronic devices like, e.g., quantum-cascade lasers. First, a multisubband Monte Carlo simulation scheme in a kinetic Boltzmann-like approach is presented. Then, its generalisation into a density-matrix quantum-transport formalism is discussed. This allows us to directly access microscopic key-features of the electron relaxation dynamics (without resorting to phenomenological parameters) as well as to investigate the nature, coherent vs incoherent, of charge injection/transport processes. Besides providing a quantitative investigation into the operation of these devices, our kinetic analysis can indeed serve as a predictive tool for the evaluation of new designs and strategies. Applications are presented concerning quantum-cascade devices, both state-of-the-art mid-infrared lasers as well as novel Thz emitters.
Microscopic modelling of semiconductor-based quantum devices: a predictive simulation strategy / Iotti, Rita Claudia; Rossi, Fausto. - In: PHYSICA STATUS SOLIDI B-BASIC RESEARCH. - ISSN 0370-1972. - STAMPA. - 238:3(2003), pp. 462-469. [10.1002/pssb.200303163]
Microscopic modelling of semiconductor-based quantum devices: a predictive simulation strategy
IOTTI, Rita Claudia;ROSSI, FAUSTO
2003
Abstract
We review and discuss the first fully three-dimensional study of non-equilibrium carrier dynamics governing semiconductor-based intersubband optoelectronic devices like, e.g., quantum-cascade lasers. First, a multisubband Monte Carlo simulation scheme in a kinetic Boltzmann-like approach is presented. Then, its generalisation into a density-matrix quantum-transport formalism is discussed. This allows us to directly access microscopic key-features of the electron relaxation dynamics (without resorting to phenomenological parameters) as well as to investigate the nature, coherent vs incoherent, of charge injection/transport processes. Besides providing a quantitative investigation into the operation of these devices, our kinetic analysis can indeed serve as a predictive tool for the evaluation of new designs and strategies. Applications are presented concerning quantum-cascade devices, both state-of-the-art mid-infrared lasers as well as novel Thz emitters.File | Dimensione | Formato | |
---|---|---|---|
Iotti-Rossi_PSSB_238_462_2003.pdf
accesso riservato
Tipologia:
2a Post-print versione editoriale / Version of Record
Licenza:
Non Pubblico - Accesso privato/ristretto
Dimensione
180.95 kB
Formato
Adobe PDF
|
180.95 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/1659045
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo