Terahertz Physics Group at Bielefeld University (UNIBI), Germany

As a strong research university with international appeal and innovative teaching concepts, Bielefeld University makes an important contribution to a progressive and participatory knowledge society. It is an attractive, family-friendly place to work and study, characterized by an open culture of communication, interdisciplinarity, diversity and freedom of personal development.

UNIBI was founded in 1969 with an explicit research assignment and a mission to provide high-quality research-oriented teaching. With 25,000 students, it now comprises 13 faculties covering a wide range of subjects in the arts and humanities, natural sciences, and technology. In addition, a medical faculty is currently in the process of being established.

UNIBI regards itself as a strong research university, ranked in the top 25 percent of the national competitive field. Its research profile is based on four strategic, thematic research priorities, which are linked by three cross-cutting topics. All research priorities are interdisciplinary and involve various faculties and central scientific institutions. Cutting-edge interdisciplinary research is carried out on the highest international level, in particular within the framework of systematically selected third-party funded projects. The strategic research priorities focus on innovative basic research. They provide important focal points for possible transfers of academic research into industrial and societal applications, in line with UNIBI’s official motto “Transcending Boundaries”.

Within the consortium, as well as coordinating the project, the UNIBI group will provide :

1) THz spectroscopy in many different modalities (standard THz TDS in the range 0.1 - 4.5 THz, ultrabroadband spectroscopy using THz air-photonics in the range 1 - 30 THz, nonlinear THz spectroscopy with THz fields up to at least 300 kV/cm, optical pump - THz probe, THz pump - optical probe, THz pump - THz probe) in order to understand the ground state conductivity, carrier dynamics, and nonlinear response of active materials used within the project, as well as the structures based thereon.

2) Modelling of nonlinear response of Dirac materials using the home-developed thermodynamic model, which was successfully employed to understand and describe nonlinear conductivity, saturable absorption, and HHG in graphene.

3) Feedback to other members of the consortium regarding material, structure, and device optimization.

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