Terahertz spectroscopy systems use far-infrared radiation to extract molecular spectral
information in an otherwise inaccessible portion of the electromagnetic spectrum. Materials …

Over the last decade there have been spectacular developments in ultrafast laser
technology, due to the introduction of solid state active materials and of new mode-locking …

We present a scheme for exploiting the nonresonant second‐order nonlinearities in electro‐
optic media to extend the bandwidth of coherent spectroscopy in the far‐infrared using …

The development of parametric devices down-converting the laser frequency to the mid-
infrared (3–30 µm) based on non-oxide nonlinear optical crystals is reviewed. Such devices …

Terahertz (THz) radiation, which lies in the far-infrared region, is at the interface of
electronics and photonics. Narrow-band THz radiation can be produced by free-electron …

We describe ultraresolution microscopy far beyond the classical Abbe diffraction limit of one
half wavelength (λ/2), and also beyond the practical limit (ca. λ/10) of aperture–based …

Chemical and physical systems undergoing change display spectral signatures from the
radio frequency to the X-ray region of the electromagnetic spectrum. This has led to the …

A novel type of Fourier-transform infrared spectrometer (FTIR) is demonstrated. It is based
on two Ti: sapphire lasers emitting femtosecond pulse trains with slightly different repetition …

Terahertz (THz) technology has experienced rapid development in the past two decades.
Growing numbers of interdisciplinary applications are emerging, including materials …

Terahertz signals were until recently an almost unexplored area of research due to the
difficulties in generation and detection of electromagnetic fields at these wavelengths …