We review different techniques for modulation of the electromagnetic properties of terahertz
(THz) waves. We discuss various approaches for electronic, optical, thermal and nonlinear …

By use of an incipient ferroelectric, SrTiO_3, as a defect material inserted into a periodic
structure of alternating layers of quartz and high-permittivity ceramic, thermal tuning of a …

A high-quality smart filter for terahertz range with relative tunability reaching 20% has been
demonstrated. The filter is based on a narrow transmission band, which originates from a …

We review recent results of both experimental and theoretical work aimed at developing
tunable devices with optical properties in the THz range controllable by an external …

We present an agile optically controlled switch or modulator of terahertz (THz) radiation. The
element is based on a one-dimensional photonic crystal with a GaAs wafer inserted in the …

One-dimensional (1D) photonic crystals (PC) containing two-layer CdS defects are
proposed and fabricated by using electron beam evaporation. Ultrafast nonlinear optical …

Optical pump–terahertz probe spectroscopy has become a widely used experimental tool for
the investigation of the ultrafast far-infrared response of polar systems. In this paper the …

In this paper, we propose a Photonic Crystal (PhC) resonator based corner reflector for
sensing the Angle-of-Arrival (AoA) of the incident wave from an interrogator. The sensor is …

The rupture of periodicity caused by one defect (defect layer) in a one-dimensional photonic
crystal (1DPhC) results in a narrow transmission spectral line in the photonic band-gap, and …

In this paper, an analytical formula for the sensitivity of optical sensors based on one-
dimensional photonic crystals (PCs) with a defect was derived for the first time. Based on this …