The generation of stable trains of ultrashort (femtosecond to picosecond), terahertz-
frequency radiation pulses with large instantaneous intensities is an underlying requirement …

Abstract The Maxwell–Lindblad transmission line (MLT) equations are introduced as a
model for hybrid photonic and microwave‐electronic quantum devices. The hybrid concept …

The use of fundamental modelocking to generate short terahertz (THz) pulses and THz
frequency combs from semiconductor lasers has become a routine affair, using quantum …

In research and engineering, short laser pulses are fundamental for metrology and
communication. The generation of pulses by passive mode-locking is especially desirable …

Ring resonators are an interesting alternative cavity solution to the commonly used ridge-
type waveguide for terahertz (THz) quantum cascade lasers. They either support a standing …

The ability to engineer quantum-cascade-lasers (QCLs) with ultrabroad gain spectra, and
with a full compensation of the group velocity dispersion, at terahertz (THz) frequencies, is …

Optical frequency combs (OFCs), which establish a rigid phase-coherent link between the
microwave and optical domains of the electromagnetic spectrum, are emerging as key high …

Ring quantum cascade lasers have recently gained considerable attention, showing
ultrastable frequency comb and soliton operation, thus opening a way to integrated …

Portable terahertz (THz) frequency comb sources are highly desired for applications in
rotational molecular spectroscopy and sensing. To date, direct THz quantum cascade laser …

Abstract The Maxwell-Bloch equations are a valuable tool to model light-matter interaction,
where the application examples range from the description of pulse propagation in two-level …