Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Part I Bandstructure Engineering, Modeling and State-of-the-Art QCLs
- 1 Basic Physics of Intersubband Radiative and Nonradiative Processes
- 2 State-of-the-Art Mid-Infrared QCLs: Elastic Scattering, High CW Power, and Coherent-Power Scaling
- 3 Long-Wavelength Mid-Infrared Quantum Cascade Lasers
- 4 Overview of the State-of-the-Art Terahertz QCL Designs
- 5 Simulating Quantum Cascade Lasers: The Challenge to Quantum Theory
- 6 Coupled Simulation of Quantum Electronic Transport and Thermal Transport in Mid-Infrared Quantum Cascade Lasers
- Part II Active Research Topics
- Part III Applications
- Index
5 - Simulating Quantum Cascade Lasers: The Challenge to Quantum Theory
from Part I - Bandstructure Engineering, Modeling and State-of-the-Art QCLs
Published online by Cambridge University Press: 25 August 2023
- Frontmatter
- Dedication
- Contents
- Preface
- Part I Bandstructure Engineering, Modeling and State-of-the-Art QCLs
- 1 Basic Physics of Intersubband Radiative and Nonradiative Processes
- 2 State-of-the-Art Mid-Infrared QCLs: Elastic Scattering, High CW Power, and Coherent-Power Scaling
- 3 Long-Wavelength Mid-Infrared Quantum Cascade Lasers
- 4 Overview of the State-of-the-Art Terahertz QCL Designs
- 5 Simulating Quantum Cascade Lasers: The Challenge to Quantum Theory
- 6 Coupled Simulation of Quantum Electronic Transport and Thermal Transport in Mid-Infrared Quantum Cascade Lasers
- Part II Active Research Topics
- Part III Applications
- Index
Summary
Quantum cascade lasers provide a variety of challenges to theory, which are outlined in this review: (i) The choice of basis states is discussed, where energy eigenstates are badly defined if the full periodic structure is considered. (ii) The tunneling through barriers requires a treatment of quantum coherences, which sets particular demands on the formulation of the quantum kinetic equations. Here the advantages and disadvantages of different approaches such as rate equations, Monte-Carlo simulations, different density matrix approaches, and Green’s functions methods are addressed. (iii) The evaluation of gain is detailed, where broadening is of utmost importance. (iv) An overview regarding the electrical instabilities of the extended structure due to domain formation is given, which strongly affect the overall performance
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- Mid-Infrared and Terahertz Quantum Cascade Lasers , pp. 153 - 172Publisher: Cambridge University PressPrint publication year: 2023