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
3 - Long-Wavelength Mid-Infrared Quantum Cascade Lasers
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
The chapter reviews long wavelength mid-infrared quantum cascade lasers (QCLs) emitting between 15 and 28 μm. Historically, 15 μm was a border wavelength above which the QCL performances dramatically degraded, which was partly due to an increase in optical losses in the devices with approaching the Reststrahlen band. This intrinsic limitation caused by multi-phonon absorption sets forbidden or favorable spectral areas depending on the employed materials. The chapter considers specific properties of long wavelength mid-infrared QCLs based on different materials, as well as more general issues related to the QCL design in this long-wavelength frontier of the mid-infrared. The discussed results are presented in the chronological order for each QCL material system, which allows the reader to follow the advances in the field.
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- Mid-Infrared and Terahertz Quantum Cascade Lasers , pp. 102 - 137Publisher: Cambridge University PressPrint publication year: 2023