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

Even though already in the seventies, right after the invention of the quantum cascade laser
(QCL) concept, it was argued that this device could be operated in the THz (far-infrared) …

In many laser systems, frequency combs whose output is frequency-modulated (FM) can
form, producing light whose frequency sweeps linearly. While this intriguing result has been …

It was recently demonstrated that broadband quantum cascade lasers can operate as
frequency combs. As such, they operate under direct electrical pumping at both mid-infrared …

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

Harmonic comb states have proven to be ubiquitous in mid-IR quantum cascade lasers. We
report here on robust, pure, self-starting harmonic mode locking in Copper-based double …

Millimeter wave (mmWave) generation using photonic techniques has so far been limited to
the use of near-infrared lasers that are down-converted to the mmWave region. However …

All-electronicultrafast control of terahertz radiation is demonstrated in integrated
metamaterial/graphene devices. By electrostatic gating the graphene conductivity, the …

Broadband metrological‐grade frequency comb (FC) synthesizers with a rich number of
phase locked modes are the ideal sources for quantum sensing and quantum metrology. At …

An electrically switchable graphene terahertz (THz) modulator with a tunable‐by‐design
optical bandwidth is presented and it is exploited to compensate the cavity dispersion of a …