Relaxation kinetics in midi-infrared quantum cascade lasers

• Autorzy: Slivken, S. , Litvinov, V. I. , Razeghi, M. , Meyer, J. R.
• Języki publikacji: EN

Abstrakty

EN

Non-equilibrium coupled electron-phonon system in active region of the quantum cascade intersubband laser is investigated. Distribution functions and gain spectra of a three-subband double-quantum-well active region are obtained as a function of temperature and injection current. The important role of the non-equilibrium phonons at lasing threshold is shown and discussed in details. It is shown that the threshold current is strongly dependent of the power dissipated in the active region in steady state. The numerical calculations for an 8.5-µm laser illustrate the general issues of relaxation kinetics in quantum cascade lasers. Temperature dependence of the threshold current is obtained in a good agreement with the experiment. We also present the results of fabrication of high-T₀ quantum cascade lasers operating in 5- and 8-µm bands.

• Czasopismo: Opto-Electronics Review
• Rocznik: 1998
• Tom: Vol. 6, No. 3
• Strony: 207-216
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Slivken, S.

autor

Litvinov, V. I.

autor

Razeghi, M.

autor

Meyer, J. R.

• Center for Quantum Devices, Northwestern University, Evanston, Illinois 60208, USA