Terahertz frequency (THz) radiation lies in between the microwave and infrared ranges.
While it is strongly absorbed by water, it is nonionizing and has low possibility of causing …

The birth of terahertz imaging approximately coincides with the birth of the journal Optics
Express. The 20^ th anniversary of the journal is therefore an opportune moment to consider …

We realized a phase retrieval technique using terahertz (THz) radiation as an alternative to
THz digital holography, named THz ptychography. Ptychography has been used in x-ray …

The apoptosis of cancer cells was experimentally measured by terahertz (THz) biosensors
based on the metamaterials (MMs). The non-bianisotropic resonance with an electric field of …

This tutorial describes the application of digital holography to the terahertz spectral region
and demonstrates how to reconstruct images of complex dielectric targets. Using highly …

A feasible and novel method for achieving high resolution and improving the quality of
reconstruction of continuous-wave terahertz digital holography is demonstrated. To our …

It is shown that the image contrast in the air when using a microscope based on dielectric
microparticles with a size of the order of wavelength can be significantly enhanced with the …

We report a coherent terahertz (THz) imaging system that utilises a quantum cascade laser
(QCL) operating in pulsed-mode as both the source and detector. The realisation of a short …

By virtue of its versatile recording geometries, ptychography is a promising full-field lensless
phase imaging approach in the prosperous research area of terahertz imaging. In this paper …

Holographic imaging techniques, which exploit the coherence properties of light, enable the
reconstruction of the 3D scenery being viewed. While the standard approaches for the …