Andreas Wacker
Professor
Quantum Kinetics of Transport and Gain in Quantum Cascade Lasers: Looking for the Essential Principles of Design
Author
Summary, in English
The complex interplay by tunneling and scattering in quantum cascade lasers is analyzed with nonequilibrium Green's functions. Data for a recently proposed simple structure based on only two wells per period is presented. This simple structure allows to visualize the relevance of the tunneling resonance very clearly. It is argued that a QCL design needs at least three levels per period, thus further simplifications of the design are not likely to occur for THz lasers. Finally the similarities and differences between quantum cascade lasers and superlattices are addressed. (C) 2010 Optical Society of America
Department/s
- Mathematical Physics
Publishing year
2010
Language
English
Publication/Series
2010 Conference On Lasers And Electro-Optics (CLEO) And Quantum Electronics And Laser Science Conference (QELS)
Links
Document type
Conference paper
Publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
Topic
- Condensed Matter Physics
Keywords
- Data visualization
- Green's function methods
- Kinetic theory
- Optical design
- Particle scattering
- Quantum cascade lasers
- Quantum well lasers
- Resonance
- Superlattices
- Tunneling
Conference name
Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science Conference (QELS)
Conference date
2010-05-16 - 2010-05-21
Status
Published
ISBN/ISSN/Other
- ISBN: 978-1-55752-890-2