High-quality optical ring resonators can confine light in a small volume and store it for
millions of roundtrips. They have enabled the dramatic size reduction from laboratory scale …

Recently, there has been a growing interest in integrated THz photonics for various
applications in communications, spectroscopy and sensing. We present a new integrated …

Quantum cascade lasers (QCLs) constitute an intriguing opportunity for the generation of on-
chip optical dissipative Kerr solitons (DKSs). Originally demonstrated in passive …

Frequency‐modulated (FM) combs feature flat intensity spectra with a linear frequency chirp,
useful for metrology and sensing applications. Generating FM combs in semiconductor …

Quantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-
scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we …

We report on microlasers based on high-quality micropillars with whispering-gallery modes
lasing. The use of low-absorbing Al0. 2Ga0. 8As/Al0. 9Ga0. 1As distributed Bragg reflectors …

Quantum cascade lasers (QCLs) are a prominent semiconductor laser source operating in
the mid-infrared and terahertz regimes. As is typical with semiconductor lasers, QCLs …

Optical frequency combs are perfectly periodic waveforms of light, whose optical spectrum
consists of a large number of equidistant modes. The mode spacing lies in the radio …

Recent years witnessed rapid progress of chip-scale integrated optical frequency comb
sources. Among them, two classes are particularly significant--semiconductor Fabry-Per\'{o} t …

We present mutual optical coupling in terahertz (THz) quantum cascade wire laser arrays
that are flip-chip bonded to a dielectric substrate. The mounting substrate is patterned for …