European Collaboration
Collaboration opportunities around European consortia, shared platforms, applications, components, imaging, and metrology.
European Collaboration: possible collaboration formats
- Exploratory scientific discussion
- Feasibility measurements
- Joint proposal or consortium preparation
- Component or algorithm co-development
- Student, doctoral, or postdoctoral research
A useful collaboration starts with a clearly stated decision or scientific question. Early exchanges can establish whether terahertz contrast is physically plausible, which samples and references are needed, and whether the work is best framed as an exploratory measurement, a research project, or a longer development programme.
Building a well-defined research collaboration
Scope, data ownership, confidentiality, sample handling, publication expectations, and validation criteria should be agreed early. The project should also define how negative or ambiguous results will be interpreted, because demonstrating the limits of a modality can be as valuable as confirming feasibility.
For consortium work, the strongest projects connect complementary expertise: domain knowledge, sample access, terahertz instrumentation, modelling, signal processing, reference metrology, and a credible route to validation. Historical collaborators named in the source dossier are not presumed to be involved in future proposals.
Related publications
- Linear to radial polarization conversion in the THz domain using a passive system — DOI
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 optical mode‑selection technique to the THz regime, the authors employ a circular metallic waveguide that supports only the fundamental TE11 and the radially polarized TM01 modes. A discontinuous phase element placed at the waveguide entrance inverts the polarization over half the beam, converting…
- Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at terahertz frequencies — DOI
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 radially polarized guided mode on the wire, with an estimated coupling efficiency of about forty percent. By exploiting the Sommerfeld wave that travels along the wire, the device can create a highly confined, longitudinal electric field at the…
- Continuous‐wave scanning terahertz near‐field microscope — DOI
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 sharp, tapered needle probe, the authors created an imaging system that can be coupled to any linearly polarized THz source and detector. The key achievement is the demonstration of sub‑micrometre‑scale resolution—roughly a third of the probe tip radius, or about 10 µm—while retaining sensitivity…
- Coupling and Propagation of Sommerfeld Waves at 100 and 300 GHz — DOI
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 coupling efficiency of about 32 percent, and confirmed experimentally a comparable value of roughly 23 percent. The wire acts as a low‑loss waveguide, with propagation losses measured at about 0.13 dB per metre for a 20 cm section, a figure that matches…
- Propagation beam consideration for 3D THz computed tomography — DOI
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 intensity spreads during propagation. This model is incorporated into a realistic acquisition simulator, allowing researchers to predict how the beam will illuminate an object from different angles and to produce more accurate projection data—sinograms—than those obtained with the…