Semiconductor superlattices are proven nanomaterials for THz nonlinear optics by means of
high order harmonic generation. Seminal approaches leading to a perfectly antisymmetric …

We apply a hybrid nonequilibrium Green's functions and relaxation rate approximation
approach to investigate frequency multiplication in the gigahertz to terahertz range …

The strong coupling of THz radiation and material excitations can improve the quantum
efficiency of THz emitters. In this paper, we investigate THz polaritons and antipolaritons …

Recent studies have predicted a strong increase in high harmonic emission in unbiased
semiconductor superlattices due to asymmetric current flow. In parallel, an external static …

We investigate the possibility of interconduction band gain without global inversion by
engineering the conduction band effective masses so that the upper lasing subband has an …

Lasing without inversion (LWI) in the extreme-ultraviolet (XUV) has been the focus of recent
research of our Princeton/Texas group. Because of the restriction imposed on the decay …

Summary The Quantum Cascade Laser (QCL) concept is extremely versatile and is now
considered to be ready for take‐off in a large variety of technological applications covering …

This special edition is dedicated to original papers covering topics with the areas of interest
of COST ACTION MP1204 whose main objective is to advance novel materials, concepts …

This paper presents a comprehensive investigation on Kerr nonlinearity in a three-level
semiconductor quantum well (SQW) superlattice and validates the existence of large Kerr …

The gain profile of a quantum cascade laser is strongly influenced by the lifetime of the
carriers in the upper and lower laser state. The quantitative description of gain within the …