Abstract
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.
| Original language | English |
|---|---|
| Article number | 59 |
| Journal | Photonics |
| Volume | 7 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 2020 |
Bibliographical note
Publisher Copyright:© 2020 by the authors.
Funding
This research was funded by the Israel Science Foundation (ISF) grant no. 1556/18. The authors would like to acknowledge the Israel Science Foundation (ISF) for their grant no. 1556/18 and the Bar-Ilan University for their generous Starting Grant for New Faculty Members. The authors also gratefully acknowledge Qing Hu from the Massachusetts Institute of Technology (MIT) for his support in performing this research and further thank John L. Reno from Sandia National Laboratories for the MBE growths. Acknowledgments: The authors would like to acknowledge the Israel Science Foundation (ISF) for their grant no. 1556/18 and the Bar-Ilan University for their generous Starting Grant for New Faculty Members. The authors also gratefully acknowledge Qing Hu from the Massachusetts Institute of Technology (MIT) for his support in performing this research and further thank John L. Reno from Sandia National Laboratories for the MBE growths.
| Funders | Funder number |
|---|---|
| Sandia National Laboratories | |
| Massachusetts Institute of Technology | |
| Bar-Ilan University | |
| Israel Science Foundation | 1556/18 |
Keywords
- Carrier leakage
- Lasing instability
- THz-QCLs