Wrocław University of Technology
Wrocław University of Technology is an autonomic legal entity of a technical university type, higher education and research institution, with long academic traditions (since 1945), and very high reputation nationally (usually among the top 3 of all the technical universities in the country) and internationally. There are employed almost 3 thousand researchers and engineers who teach over 35 000 students at 12 faculties. WRUT will be represented in the project by the Laboratory for Optical Spectroscopy of Nanostructures at the Institute of Physics (LOSN - http://osn.pwr.edu.pl/) having about 30 people in the group consisting half of permanent staff and half of PhD students. The laboratory specializes in the application of different optical techniques for characterization of new semiconducting materials, low dimensional structures and photonic devices, and has all the necessary facilities for these studies. The experimental tools are supported by theoretical modelling including band structure calculations and carrier kinetics via rate equations. The group has been involved in a number of international collaborations worldwide (e.g. Würzburg University, Germany; Stanford University, USA; McMaster University, Canada; University of Kassel, Germany; NRC Ottawa, Canada; III-V Lab, France; EPFL, Switzerland, and many others) and took part in several EU projects of the V-VII Framework Programmes in the fields of photonics and optoelectronics. This included the development of novel infrared semiconductor lasers for laser-based gas sensing, plus several projects on related subjects founded nationally. The WRUT team has many years of experience in various kinds of optical spectroscopy techniques including the mid and long infrared wavelength range above 3 μm, which, beside participation in the projects, is additionally proven by more than 20 publications in that subject from the group within the last 5 years. Most of these studies employed a state of the art and unique setup based on a vacuum Fourier transform spectrometer with custom designed external sample chamber for experiments with additional modulating light beam as photoluminescence or photoreflectance. According to its expertise, the WRUT team is committed to study in detail the optical and electronic properties of the ICL active material, and the characteristics of full laser structures, including the dynamic response by means of several advanced optical spectroscopy methods. This is supported by theoretical modelling of the band structure and the kinetic properties. Characterization will be carried out with short response times and results will be distributed electronically to the involved beneficiaries in order to ensure a fast feedback as required for efficient material development. The characterization will concern both, the fundamental study of the active region for its design optimization, as well as more sophisticated time-resolved experiments including up-conversion techniques for determining respective time constants.