The work presents a compact, passive device that transforms a conventional linearly polarized terahertz (THz) beam into a radially polarized one, a field configuration that offers superior focusing, enhanced longitudinal fields, and improved coupling to near‑field probes. By adapting a proven…
The work reported by Guillet, Chusseau, Adam, Grosjean, Penarier, Baida and Charraut describes the development of a continuous‑wave terahertz (THz) near‑field microscope that exploits Sommerfeld surface waves guided along metallic wires. By combining differential phase plates, a Y‑splitter and a…
The study delivers a comprehensive, validated framework for designing metallic grid absorbers with precisely tailored electrical resistivity, enabling the creation of efficient, room‑temperature bolometers and other thermal detectors. By treating structured metal layers as equivalent homogeneous…
The work presents a novel passive probe antenna that can be operated at terahertz (0.1 THz) frequencies using a simple, purely passive structure. The antenna consists of a slender metal wire backed by a discontinuous phase plate that converts an ordinary linearly‑polarized free‑space beam into a…
The study introduces a new physical model that captures the real behaviour of terahertz (THz) radiation when used for three-dimensional tomographic imaging. Unlike conventional X‑ray methods that treat the beam as a straight, uniform ray, the authors model the THz pulse as a Gaussian beam whose…
The study demonstrates that millimetre‑wave guided modes—known as Sommerfeld waves—can be efficiently launched and transported along simple metallic wires at 100 GHz and 300 GHz. By inserting a straightforward differential phase plate in front of the wire, the researchers achieved a theoretical…
An in-depth editorial guide to Aeronautics composite material inspection with a terahertz time-domain spectroscopy system, its scientific context, terahertz contribution, applications, and collaboration potential in Non-Destructive Testing.
Terahertz (THz) imaging exploits the unique ability of 0.3–10 THz radiation to penetrate a wide range of dielectric materials while providing spectroscopic fingerprints of many chemical species. The reviewed work demonstrates that, beyond conventional two‑dimensional transmission or reflection…
Terahertz time‑domain spectroscopy (THz‑TDS) is a powerful, contact‑less technique for probing the internal structure of layered materials, a capability that is increasingly valuable in aerospace, automotive, composite manufacturing, and cultural heritage conservation. Conventional THz‑TDS analysis…
A new terahertz imaging platform has been introduced that reconciles the high sensitivity of terahertz (THz) radiation with the practical constraints of industrial and medical diagnostics. By focusing femtosecond pulses from a fiber‑coupled 1.56 µm laser onto a thin gallium arsenide crystal, the…
An in-depth editorial guide to Multimodal Optical Diagnostics of Glycated Biological Tissues, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.
An in-depth editorial guide to Terahertz biophotonics as a tool for studies of dielectric and spectral properties of biological tissues and liquids, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.
An in-depth editorial guide to Art Painting Diagnostic Before Restoration with Terahertz and Millimeter Waves, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.
Terahertz (THz) imaging and tomography have been shown to provide a rapid, non‑destructive and radiation‑free method for inspecting polymer parts produced by additive manufacturing. Unlike conventional X‑ray tomography, THz techniques offer the possibility of routine quality assurance for complex…
The authors present a comprehensive, automated image‑processing pipeline that transforms raw terahertz (THz) radiographs into detailed three‑dimensional reconstructions of an object’s internal structure. The sequence combines a regularized tomographic reconstruction algorithm with K‑means…
This research introduces a practical, high‑performance technique for three‑dimensional terahertz (THz) tomography that is designed to meet the stringent demands of non‑destructive inspection in industrial and cultural heritage contexts. The method refines the maximum‑likelihood reconstruction…
The work presents a room‑temperature terahertz (THz) detector based on a thermopile that converts absorbed THz radiation into a measurable voltage. The sensor’s absorber is a metallic grid engineered through a multilayer theoretical model that accounts for diffraction and equivalent resistivity,…
Executive Summary The research presented here delivers a novel room‑temperature terahertz (THz) sensor that converts incident electromagnetic power into a measurable electrical signal via a thermopile assembled on a micro‑fabricated silicon dioxide membrane. By using a metallic grid absorber…
The research team from Bordeaux and Limoges has engineered a compact, optics‑free terahertz imaging system that delivers high‑resolution reflectometry through a single hollow‑core waveguide. By integrating two photoconductive antennas on a single low‑temperature gallium arsenide chip and coupling…
An in-depth editorial guide to Ex Vivo Breast Tumor Identification: Advances Toward a Silicon-Based Terahertz Near-Field Imaging Sensor, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.
The study demonstrates a new generation of terahertz‑frequency radar probes that combine a frequency‑modulated continuous‑wave (FMCW) transmitter with a thin‑wall hollow‑core dielectric waveguide. By guiding the millimetre‑wave signal directly inside a polymer pipe, the device eliminates the need…
Hybrid Optical Bench for Innovative Teaching and learning (HOBIT) combines a physical optical table with a real‑time, self‑adaptive digital simulation and augmented‑reality overlays. The system enables any optical experiment to be assembled, adjusted, and observed in a single secure,…
The research introduces a handheld terahertz (THz) sensing platform that fuses a frequency-modulated continuous wave (FMCW) radar with a smartphone‑based augmented reality (AR) interface. The integration eliminates the need for heavy mechanical scanners, reducing system weight and cost while…
The study demonstrates that a compact, frequency‑modulated continuous‑wave radar operating at 300 GHz can non‑destructively image rock interiors with unprecedented detail. By scanning a 121 cm² area in only fifteen minutes, the system resolves millimetre‑scale fractures and subtle lithological…
The 150 GHz continuous‑wave radar, based on a homodyne eight‑harmonic mixing architecture, delivers non‑contact, high‑dynamic‑range imaging of a broad class of materials at sub‑millimetre depth resolution and up to 7.6 kHz frame rates. Achieving a 100 dB measurement dynamic range for few‑second…
Terahertz technology is emerging as a powerful, contact‑free tool for the aeronautics sector, offering both rapid structural health monitoring and precise material characterization. The study demonstrates that frequency‑modulated continuous‑wave (FMCW) radars operating in the 100–300 GHz band can…
Terahertz near‑field microscopy built around a scanning point terahertz source (SPoTS) achieves a spatial resolution of approximately ten micrometres, breaking the diffraction‑limited barrier that has traditionally constrained terahertz imaging to millimetre scales. By placing a formalin‑fixed,…
An in-depth editorial guide to Tunable ultrafast infrared generation in a gas-filled hollow-core capillary by a four-wave mixing process, its scientific context, terahertz contribution, applications, and collaboration potential in Components & Antennas.
Executive Summary A team of researchers from KTH Royal Institute of Technology, INSA Rennes, the University of Bordeaux, and ESA has developed and experimentally validated a fully metallic geodesic Luneburg lens antenna that operates in the sub‑terahertz (sub‑THz) frequency band between 128 and 132…