Welcome to the Unterrainer group

The terahertz region of the electromagnetic spectrum is a frontier area for photonics research.

This part of the electromagnetic spectrum has been less well explored and has been called the "terahertz gap" because of the lack of high-power, room-temperature sources and efficient detectors. The generation and detection of radiation in this frequency range is difficult. Scaling and extrapolating known concepts of the microwave or infrared ranges is, in general, not possible. However, solid state quantum devices, which allow the realization of quantum optical concepts, e.g. for lasers and photon emitters, are very promising radiation sources in the THz range.

Our research interests are

Semiconductor quantum structures for novel photonic devices Ultrafast lasers and terahertz time domain spectroscopy Two-dimensional materials and their interaction with light



Latest news:


Congratulations to Michael Krall and Andreas Pospischil for their successful PhD thesis defenses!


Congratulations to Govinda Lilley for his successful PhD thesis defense!


Congratulations to Florian Höller and Matthias Paur to their graduation to Dipl. Ing.!


The article "Instant imaging with terahertz lasers" by ThzLabs-Researchers M. Brandstetter, C. Deutsch, M. Krall und Principal Investigator Karl Unterrainer in Compound Semiconductor Magazine about real-time imaging new Terahertz technology is now available online!


Welcome to our new PhD students Sebastian Schönhuber and Martin Kainz!