A terahertz (THz) frequency comb capable of high-resolution measurement will significantly
advance THz technology application in spectroscopy, metrology and sensing. The recently …

Terahertz quantum cascade laser sources based on intra-cavity difference frequency
generation from mid-IR devices are an important asset for applications in rotational …

Miniaturized frequency combs (FCs) can be self-generated at terahertz (THz) frequencies
through four-wave mixing in the cavity of a quantum cascade laser (QCL). To date, however …

Broadband, quantum-engineered, quantum cascade lasers (QCLs) are the most powerful
chip-scale sources of optical frequency combs (FCs) across the mid-infrared and the …

Two techniques for terahertz (THz) frequency metrology based on frequency comb, namely,
a THz-comb-referenced spectrum analyzer and a continuously tunable, single-frequency …

We report a metrological-grade THz spectroscopy based on the combination of a THz
frequency-comb synthesizer (FCS) and a THz quantum cascade laser (QCL). The QCL …

Optical frequency combs, consisting of well‐controlled equidistant frequency lines, have
been widely used in precision spectroscopy and metrology. Terahertz combs have been …

High-resolution spectroscopy not only can identify atoms and molecules but also can
provide detailed information on their chemical and physical environment and relative …

Optical frequency comb synthesizers have represented a revolutionary approach to
frequency metrology, providing a grid of frequency references for any laser emitting within …

We report on a heterogeneous active region design for terahertz quantum cascade laser
based frequency combs. Dynamic range, spectral bandwidth and output power have been …