Quantum Kinetics of Transport and Gain in Quantum Cascade Lasers: Looking for the Essential Principles of Design
Wacker, Andreas (2010). Quantum Kinetics of Transport and Gain in Quantum Cascade Lasers: Looking for the Essential Principles of Design 2010 Conference On Lasers And Electro-Optics (CLEO) And Quantum Electronics And Laser Science Conference (QELS). Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science Conference (QELS): IEEE - Institute of Electrical and Electronics Engineers Inc.
Conference Proceeding/Paper
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Published
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English
Department:
Mathematical Physics
Abstract:
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
Keywords:
Data visualization ;
Green's function methods ;
Kinetic theory ;
Optical design ;
Particle scattering ;
Quantum cascade lasers ;
Quantum well lasers ;
Resonance ;
Superlattices ;
Tunneling
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