Comparison on material parameter measurements in the THz spectral range with optical, resonant and VNA based setups
Project Description
This pilot study is part of the EMPIR Project TEMMT (18SIB09). Therein, different methods for material parameter measurements in the THz spectral range will be compared.
The different measurement setups include optical (TDS or FDS) and resonant or VNA based systems, all of which have unique properties like e.g. spectral coverage. The comparison will cover a frequency range from approximately 100 GHz up to potentially several THz. The exact frequency range is left open and different systems will have different frequency coverage. Part of the study is also to evaluate frequency limits of the different setups. A set of reference materials will be measured by as many setups as possible. In addition, the measurements will be analysed with different material parameter extraction methods to study and compare different algorithms.
External funding is available through EMPIR.
Final Report 2022-07-31
The project has been completed and the report can be downloaded here>>.
This pilot study was part of the EMPIR (18SIB09) TEMMT project. Therein, different methods for material parameter measurements in the THz spectral range have been compared. The different measurement setups include optical (TDS or FDS) and resonant or VNA-based systems, all of which have unique properties like e.g. spectral coverage and system dynamics. The comparison covered a frequency range from approximately 100 GHz up to several THz. Part of the study was also to evaluate frequency limits of the different setups. A set of reference materials has been measured by as many setups as possible. In addition, the measurements have been analysed with different material parameter extraction methods to study and compare different algorithms. In a final report, results are presented and compared with the associated uncertainties for the real and imaginary parts of permittivity. This shows the advantages and disadvantages of each method and setup in terms of sensitivity, stability and spectral coverage.
Progress Report 2021-10-12
Three more participants (PTB, Military University of Technology and University of Fribourg) have joined which leads to a total number of eleven participants from eight institutes.
Most of the participants have finished their measurements. The set of reference materials consists of various specimens, high-loss to low-loss, with different thicknesses. It is expected that the last participant will finish the measurements by the end of the year 2021. The participants should send their complete measurement results by the end of February 2022 latest.