Observation of the nonequilibrium optical phonons population associated with electron transport in quantum-cascade lasers is reported. The phonon occupation number was measured in the range 75-280 K by using a combination of microprobe photoluminescence and Stokes/anti-Stokes Raman spectroscopy. The excess phonon population is observed to decrease as the lattice temperature increases. From the nonequilibrium phonon population, we extracted interface phonon lifetimes of 5 ps at 75 K and 2 ps at 280 K.

Nonequilibrium optical phonon generation by steady-state electron transport in quantum-cascade lasers / Spagnolo, V.; Scamarcio, G.; Troccoli, M.; Capasso, F.; Gmachl, C.; Sergent, A. M.; Hutchinson, A. L.; Sivco, D. L.; Cho, A. Y.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 80:23(2002), pp. 4303-4305. [10.1063/1.1481186]

Nonequilibrium optical phonon generation by steady-state electron transport in quantum-cascade lasers

Spagnolo, V.;
2002-01-01

Abstract

Observation of the nonequilibrium optical phonons population associated with electron transport in quantum-cascade lasers is reported. The phonon occupation number was measured in the range 75-280 K by using a combination of microprobe photoluminescence and Stokes/anti-Stokes Raman spectroscopy. The excess phonon population is observed to decrease as the lattice temperature increases. From the nonequilibrium phonon population, we extracted interface phonon lifetimes of 5 ps at 75 K and 2 ps at 280 K.
2002
Nonequilibrium optical phonon generation by steady-state electron transport in quantum-cascade lasers / Spagnolo, V.; Scamarcio, G.; Troccoli, M.; Capasso, F.; Gmachl, C.; Sergent, A. M.; Hutchinson, A. L.; Sivco, D. L.; Cho, A. Y.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 80:23(2002), pp. 4303-4305. [10.1063/1.1481186]
File in questo prodotto:
File Dimensione Formato  
20-APL_hot phonon_2002.pdf

accesso aperto

Tipologia: Versione editoriale
Licenza: Tutti i diritti riservati
Dimensione 95.65 kB
Formato Adobe PDF
95.65 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/5679
Citazioni
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 26
social impact