Quantum cascade lasers are compact devices based on mature compound semiconductors
such as GaAs that take advantage of highly developed optoelectronic fabrication techniques …

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) …

Ultra-short pulses are an attractive way of expanding today's terahertz time-domain systems
toward frequencies above 2 THz, and moreover mode control enables reliable generation of …

The terahertz spectral range (λ= 30–300 µm) has long been devoid of compact, electrically
pumped, room-temperature semiconductor sources,,,. Despite recent progress with terahertz …

The technological solutions and optical configurations employed to tune the emission
frequency of quantum cascade lasers (QCLs) operating in the Terahertz range are reviewed …

Terahertz quantum cascade laser sources based on intra-cavity difference-frequency
generation are currently the only room-temperature mass-producible diode-laser-like …

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 …

Terahertz quantum cascade lasers are compact, electrically pumped semiconductor laser
sources that are capable of delivering tens of milliwatts of power in continuous wave. Here …

The operation of quantum cascade lasers has to date been demonstrated over a broad
frequency range in the terahertz spectrum (from 4.4 THz to 1.2 THz),,. Most potential …

Room temperature, broadly tunable, electrically pumped semiconductor sources in the
terahertz spectral range, similar in operation simplicity to diode lasers, are highly desired for …