Nowadays terahertz spectroscopy is fast becoming a method of choice both in industrial and
security applications. This spectroscopic method requires a device that produces broadband …

Abstract Quantum Cascade Lasers (QCLs) are coherent light sources that make use of
intraband transitions of wavefunction engineered semiconductor quantum wells. They have …

Quantum cascade laser (QCL) is a promising candidate for comparatively less developed
terahertz spectral range. Design-dependent emission frequency and sequential pumping …