The design, manufacture and study by methods of spectroscopy and microscopy of terahertz metal-dielectric photonic quasicrystal structures are considered.

We present the latest development of Tydex LLC - a high-power pulsed terahertz (THz) spectrometer PTS-1. In PTS-1 THz radiation is generating by means of optical rectification under the Cherenkov phase-matching conditions. Thanks to the use of a high-power pump laser and because of the selected method of generating THz radiation, we succeeded in achieving a high average output power of THz radiation in our system.

A binary silicon diffractive optical element (DOE) focusing laser radiation onto an axial segment (or a DOE with elongated focal depth) for the terahertz spectral range has been designed and characterized using terahertz radiation of the Novosibirsk Free Electron Laser (NovoFEL).

A binary silicon diffractive optical element (DOE) focusing laser radiation onto an axial segment (or a DOE with elongated focal depth) for the terahertz spectral range has been designed and characterized using terahertz radiation of the Novosibirsk Free Electron Laser (NovoFEL).

We present the first findings of the terahertz emission from the ultra-narrow p-type silicon quantum well confined by the δ-barriers heavily doped with boron on the n-type Si (100) surface. The THz spectra revealed by the voltage applied along the Si-QW plane appear to result from the radiation of the dipole boron centers.

We present the results of calculation and experimental testing of the tunable wavelength terahertz polarization converter (TWPC) represented by set of plane-parallel birefringent plates with in-plane birefringence axis. An experimental device has been produced and tested. The calculations show that the effect of interference between the interfaces, including air gaps, may be neglected. Considered device may be used as the simple narrow achromatic waveplate, or Solc band pass filter for the specified wavelength.

Binary silicon-based diffractive optical element (DOE)—Gaussian-to-Square focuser (diameter of aperture is 30 mm) for the terahertz spectral range has been designed and characterized using terahertz radiation of the Novosibirsk Free Electron Laser (NovoFEL) at the wavelength of 141 μm. The preliminary experiments have demonstrated feasibility of application of binary silicon DOE for focusing of terahertz radiation into pre-given focal domain.

We present the results of calculation and experimental testing of the tunable wavelength terahertz polarization converter represented by a set of plane-parallel birefringent plates with an in-plane birefringence axis. An experimental device has been produced and tested. The calculations show that the effect of interference between the interfaces, including air gaps, may be neglected. The considered device may be used as a simple narrow achromatic waveplate, or a Solc band pass filter for the specified wavelength.