Wavefunction engineering towards high-performance terahertz quantum cascade lasers
Abstract In the quest for high-performance terahertz (THz) quantum cascade lasers (QCLs), this study introduces a generalized wavefunction engineering approach to efficiently control state populations at elevated temperatures. Analyzing known two-well structures and their limitations, a three-well Q...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-10080-4 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Abstract In the quest for high-performance terahertz (THz) quantum cascade lasers (QCLs), this study introduces a generalized wavefunction engineering approach to efficiently control state populations at elevated temperatures. Analyzing known two-well structures and their limitations, a three-well QCL design based on a direct depopulation scheme is proposed. Employing a combination of rate equations-density matrix and NEGF modelings, our design achieves superior performance at 290 K by simultaneously optimizing injection coupling, thermal back-filling, and electron escape rates from upper and lower lasing states to parasitic states. |
|---|---|
| ISSN: | 2045-2322 |