In this review, we describe dielectric properties of biological tissues and liquids in the
context of terahertz (THz) biophotonics. We discuss a model of the THz dielectric permittivity …

Terahertz (THz) waves are nowadays used in a multitude of applications ranging from
medicine, telecommunication, security surveillance, to fast sensing and imaging. Along with …

The terahertz region of the electromagnetic spectrum has been the least utilized owing to
inadequacies of available sources. We introduce a compact, widely frequency-tunable …

We present a robust approach to generate a continuously tunable, low phase noise, Hz
linewidth and mHz/s stability THz emission in the 0.1 THz to 1.4 THz range. This is achieved …

Room-temperature terahertz (THz) quantum cascade laser sources with intracavity
difference-frequency nonlinear mixing are electrically pumped monolithic semiconductor …

Terahertz laser frequency combs based on quantum cascade lasers provide coherent,
broadband, electrically pumped, THz radiation sources for use in future spectroscopic …

Highly excited Rydberg states of excitons in Cu 2 O semiconductors provide a promising
approach to explore and control strong particle interactions in a solid-state environment. A …

An amplifying quantum-cascade (QC) metasurface, the key component of the QC vertical-
external-cavity surface-emitting-laser (VECSEL), is studied as a function of injected current …

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Despite decades of research, no frequency tunable sources span the terahertz gap between
0.3 and 3 THz. By introducing methyl fluoride (CH 3 F) as a new gain medium for a quantum …