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Portrait of Andreas Wacker. Photo: Kennet Ruona

Andreas Wacker


Portrait of Andreas Wacker. Photo: Kennet Ruona

Quantum Kinetics of Transport and Gain in Quantum Cascade Lasers: Looking for the Essential Principles of Design


  • Andreas Wacker

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


  • Mathematical Physics

Publishing year





2010 Conference On Lasers And Electro-Optics (CLEO) And Quantum Electronics And Laser Science Conference (QELS)

Document type

Conference paper


IEEE - Institute of Electrical and Electronics Engineers Inc.


  • Condensed Matter Physics


  • 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




  • ISBN: 978-1-55752-890-2