Abstract
In this research we investigate the issues that arise from line broadening in m-plane GaN Terahertz Quantum Cascade Lasers (THz QCLs). Our study using non-equilibrium Green's functions (NEGF) shows that factors beyond longitudinal-optical (LO) phonon coupling contribute to line broadening. Despite these challenges, increased doping densities were found to increase gain, allowing for lasing at up to 280 K at 7.2 THz. This indicates the potential of practical GaN-based THz QCLs for high-temperature applications, suggesting avenues for achieving room temperature operation and advancing THz QCL development.
| Original language | English |
|---|---|
| Title of host publication | 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024 |
| Publisher | IEEE Computer Society |
| ISBN (Electronic) | 9798350370324 |
| DOIs | |
| State | Published - 2024 |
| Event | 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024 - Perth, Australia Duration: 1 Sep 2024 → 6 Sep 2024 |
Publication series
| Name | International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz |
|---|---|
| ISSN (Print) | 2162-2027 |
| ISSN (Electronic) | 2162-2035 |
Conference
| Conference | 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024 |
|---|---|
| Country/Territory | Australia |
| City | Perth |
| Period | 1/09/24 → 6/09/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- GaN
- LO-phonon
- THz QCLs
- line broadening