Abstract
We report on a comparative study of GaAs/Al0.45Ga 0.55As mid-infrared quantum cascade lasers. Devices differ in the mechanisms for depopulating the lower laser level. The depopulation mechanisms rely on longitudinal optical (LO) phonon emission into a single subband, into two subbands or into a set of subbands forming a miniband. The influence of injector doping density and electron confinement on device characteristics is explored experimentally and theoretically. The mechanisms limiting high temperature operation and the dynamic range are investigated.
Original language | English |
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Pages (from-to) | 411-414 |
Number of pages | 4 |
Journal | Physica Status Solidi C: Conferences |
Volume | 3 |
Issue number | 3 |
Early online date | 21 Feb 2006 |
DOIs | |
Publication status | Published - 1 Mar 2006 |
Externally published | Yes |
Event | 32nd International Symposium on Compound Semiconductors - Rust, Germany Duration: 18 Sep 2005 → 22 Sep 2005 Conference number: 32 |