The Significance of Carrier Leakage for Stable Lasing in Split-Well Direct Phonon Terahertz Quantum Cascade Lasers

The Significance of Carrier Leakage for Stable Lasing in Split-Well Direct Phonon Terahertz Quantum Cascade Lasers

We studied the temperature performance of split-well direct phonon terahertz quantum cascade lasers and found that it is limited by a lasing instability that becomes significant as the temperature increases. When the hot electrons of the upper laser level cannot scatter effectively to excited states...

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Bibliographic Details
Published in:Photonics Vol. 7; no. 3; p. 59
Main Authors: Lander Gower, Nathalie, Piperno, Silvia, Albo, Asaf
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-09-2020
Subjects:
carrier leakage
Design
Energy
Hot electrons
Lasers
Lasing
lasing instability
Molecular beam epitaxy
Phonons
Population decline
Quantum cascade lasers
Structural stability
Temperature
THz-QCLs
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Summary:We studied the temperature performance of split-well direct phonon terahertz quantum cascade lasers and found that it is limited by a lasing instability that becomes significant as the temperature increases. When the hot electrons of the upper laser level cannot scatter effectively to excited states due to the high radiative barriers of the structures, a lasing instability occurs, which limits the temperature performance.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics7030059