Quantum cascade lasers (QCLs) represent the most fascinating achievement of quantum
engineering, showing how artificial materials can be generated through quantum design …

Kerr frequency combs have been attracting significant interest due to their rich physics and
broad applications in metrology, microwave photonics, and telecommunications. In this …

We present a semiconductor injection laser operating in continuous wave with emission
covering more than one octave in frequency and displaying homogeneous power …

The Terahertz or millimeter wave frequency band (300 GHz-3 THz) is spectrally located
between microwaves and infrared light and has attracted significant interest for applications …

Stable terahertz sources are required to advance high-precision terahertz applications such
as molecular spectroscopy, terahertz radars, and wireless communications. Here, we …

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 …

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

A method to reconstruct the terahertz (THz) refractive index and absorption coefficient of in
vivo tissue using THz pulsed spectroscopy (TPS) has been proposed. The method utilizes a …

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

We provide an overview on terahertz (THz) frequency metrology, starting from the nowadays
available continuous wave THz sources, discussing their main features such as tunability …