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
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.| 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.
