Terahertz radiation has become an important diagnostic tool in the development of new
technologies. However, the diffraction limit prevents terahertz radiation (λ≈ 0.01–3 mm) …

Infrared and optical spectroscopy represents one of the most informative methods in
advanced materials research. As an important branch of modern optical techniques that has …

We discuss the progress in the field of THz imaging based on time-domain spectroscopy
during the last 20 years emphasizing several highlights. These include 3D map** of the …

Near-field microscopy discloses a peculiar potential to explore novel quantum state of matter
at the nanoscale, providing an intriguing playground to investigate, locally, carrier dynamics …

In many fields, such as environmental monitoring, food safety, and medical diagnostics, the
identification of organic compounds is essential. It is crucial to create exceptionally sensitive …

While near-field infrared nanospectroscopy provides a powerful tool for nanoscale material
characterization, broadband nanospectroscopy of elementary material excitations in the …

Terahertz (THz) biological imaging has attracted intense attention due to its capability of
acquiring physicochemical information in a label‐free, noninvasive, and nonionizing …

Over the past decade, the demonstration of frequency combs has been reported in a wide
range of quantum cascade lasers. These combs have huge potential in applications …

Scattering-type scanning near-field microscopy (s-SNOM) at terahertz (THz) frequencies
could become a highly valuable tool for studying a variety of phenomena of both …

Modern scattering-type scanning near-field optical microscopy (s-SNOM) has become an
indispensable tool in material research. However, as the s-SNOM technique marches into …