Terahertz time-domain spectroscopy (THz-TDS) is a powerful technique for material's
characterization and process control. It has been used for contact-free conductivity …

We review the basic physics and applications of a special class of planar metamaterials,
often called metasurfaces, which are composed of optically thin and densely packed planar …

Metamaterials offer exciting opportunities that enable precise control of amplitude,
polarization and phase of the light beam at a subwavelength scale. A gradient metasurface …

The numerical aperture (NA) of a lens determines its focusing resolution capability and the
maximum light collection or emission angle. In this Letter, an ultrathin high NA metalens …

A new structure is reported, which realizes the flat focusing by introducing the silicon
subwavelength slits into the waveguide. The subwavelength silicon-air slits, with variable …

This paper covers our recent work on terahertz reflectarray antennas, providing a broad,
critical perspective, and contrasting different approaches. The reflectarray antenna is a well …

Detection of low concentrations of gaseous explosive formulations with NO x derivatives has
been a demanding challenge, specifically because the hazard is colossal. Change in the …

Reflective multichannel metasurfaces are flat reflectors that can control incident and
reflected waves in a number of propagating directions simultaneously. However, they are …

We demonstrate a terahertz time-domain spectroscope for spatially resolved pump-probe
experiments which are based on terahertz probe pulse generation with a photo-conductive …

An all-dielectric photonic metastructure is investigated for application as a quantum
algorithm emulator (QAE) in the terahertz frequency regime; specifically, we show …