17 June 2022

Next generation THz ellipsometer growing

We have recently assembled all components of our new THz ellipsometer on its goniometer at the 8T magnet. Still in development, the new setup features an optimized optical design for very long wavelengths (100GHz, millimeterwaves) and we aim to measure full Müller matrices. New technology for source and detector will allow faster detection and enable new modulation schemes for sensitivity enhancement. The new instrument utilizes also 3D-printed components and is entirely based on in-house developed controls. 
The work is supported by the Knut & Alice Wallenberg foundation, the Swedish Center for III-Nitride Technology (C3NiT, Vinnova), and the Swedish Research Council.

THz ellipsometer


Chapter on Phonon Properties published in book Gallium Oxide

In this chapter, written by members of our team we present and discuss the complete set of infrared-active phonon modes in monoclinic-symmetry crystal modification gallium oxide. This chapter attempts to summarise the current state of knowledge about the optical phonon mode propoerties and their coupling with free charge carriers in gallium oxide with monoclinic crystal structure.

You can find the book at springer.com.

The 2nd Swedish Terahertz workshop

The 2nd Swedish Terahertz workshop was held on the 28th of March 2019 at Linköping University. It was organized by the members of the Terahertz Materials Analysis Center (THeMAC).

During the event participants could listen to the presentations given by scientists from Sweden, USA and Italy working in the area of terahertz technologies and materials. In addition, participants had a chance to join the guided tour to the lab facilities of the THeMAC.

THz frequency-domain ellipsometer and OHE instrument

2018 May: The OHE instrument was integrated into the THz frequency-domain ellipsometer. The instrument has been re-configured to accommodate the superconducting magnet with VTI providing magnetic fields up to 8 Tesla and samples temperatures in range of 2.5 – 400 Kelvin. In addition, the accessible spectra range was extended into the far-infrared range by installing the Bruker Vertex 70 FIR spectrometer-based source.

Data storage and analysis lab

2018 May: The analysis and data storage server has been set up. The server has 1 CPU with 12 physical cores (24 virtual) and 64 GB RAM, and thus can handle multiple heavy analysis tasks. Another CPU and more RAM can be added if needs arises.

The server has been set up to allow connection of external users. So far we succesfully connected from Windows and Linux OSs, and we testing with Mac OS.

The  analysis software has also been istalled and is ready to use. Currently the databses have been prepared.

Latest news from LiU

Man holds golden plate (Urban Forsberg).

He has a key to solving the semiconductor shortage

The semiconductor shortage is becoming increasingly urgent. Linköping University conducts materials research in close collaboration with industry, with a view to increasing the semiconductor production rate in Europe.

Portrait of two persons.

Two new Wallenberg Academy Fellows at LiU

Researchers Olaf Hartig and Alexander Gillett have been appointed Wallenberg Academy Fellows at LiU. The five-year grants are intended to make it possible for young researchers to make important scientific breakthroughs.

Vallastaden in Linkoping

Linköping is Europe's most innovative city – thanks largely to LiU

Linköping is the first Swedish city to win one of the European Commission’s European Capital of Innovation Awards (iCapital). LiU has played an important part in this success in many ways.