Optical gain of type II inter-sub-band quantum cascade lasers
| Autor: | J.L. Jimenez, E. E. Mendez |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
business.industry
Chemistry Physics::Optics Heterojunction General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Laser Semiconductor laser theory law.invention Condensed Matter::Materials Science Cascade Quantum dot laser law Band diagram Materials Chemistry Optoelectronics Semiconductor optical gain business Quantum well |
| Zdroj: | Solid State Communications. 110:537-541 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/s0038-1098(99)00141-6 |
| Popis: | We have calculated the optical gain of inter-sub-band quantum cascade lasers based on type II heterostructures such as InAs–GaSb–AlSb, using a model that includes the whole band diagram of the structure as well as the dynamics of all the processes involved. A comparison with similar calculations for conventional type I quantum cascade lasers based on the InGaAs–InAlAs heterostructure shows the theoretical superiority of type II lasers, with an optical gain more than 50% higher than that of type I lasers and a much more efficient energy conversion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect