Project Area A: Fundamentals Project Title Doctoral Researcher and Postdocs involved A02 Four-wave-mixing spectroscopy and optical pulse propagation in wide gap semiconductors M. Sc. Jonas Vondran, TU DO M.Sc. Stefan Grisard, TU DO A03 Cavity enhanced two-photon physics with semiconductor quantum dots M. Sc. Björn Jonas, UPB M. Sc. Timo Langer, UPB Dr. Dirk Heinze, UPB A04 Nonlinear cavity polariton physics for functional photonic elements M. Sc. Bernd Berger, TU DO Dr. Xuekai Ma, UPB A06 Tailored ultrafast acoustics for light emission modulation M .Sc. Lars Klompmaker, TU DO M. Sc. Tobias Henksmeier, UPB M.Sc. Michal Kobecki, TU DO A07 Widely non-degenerate stimulated two-photon emission in semiconductors Dr. Wolf-Rüdiger Hannes, UPB M. Sc. Laura Krauss-Kodytek, TU DO A08 Coupling between plasmonic excitations and intersubband transitions in nonlinear metasurfaces M. Sc. Daniel Frese, UPB Project Area B: Materials Project Title Doctoral Researcher und Postdocs involved B01 Nonlinear multi-photon and harmonics generation spectroscopy on ZnO-based nanostructures M. Sc. Maximilian Albert, UPB Dr. Johannes Mund, TU DO B02 Nonlinear optics and coherent intersubband physics of cubic GaN/Al(Ga)N heterostructures M. Sc. Jan Mundry, TU DO M.Sc. Mario Littmann, UPB B04 Ab initio theory for photonic materials Dr. Agnieszka Kozub, UPB M. Sc. Sergej Neufeld, UPB M. Sc. Falko Schmidt, UPB B05 Tailored KTP and LiNbO3 waveguide structures for counter-propagating parametric downconversion processes M. Sc. Peter Mackwitz, UPB M. Sc. Laura Padberg, UPB Project Area C: Functional Structures Project Title Doctoral Researcher und Postdocs involved C01 Engineered frequency conversion devices M. Sc. Jano Gil Lopez, UPB M. Sc. Carolin Lüders, TU DO C02 Integrated SU(1,1) interferometers M. Sc. Alessandro Ferreri, UPB Dr. Kai-Hong Luo, UPB C04 Ultrafast electric control of optical polarizations and transitions M. Sc. Farheen Henna, UPB M. Sc. Sebastian Krehs, UPB Dr. Alex Widhalm, UPB C05 Nonlinear optical surfaces based on ZnO-plasmonic hybrid-nanostructures M. Sc. Christian Golla, UPB Dr. Yevgen Grynko C06 Integrated measurement-induced nonlinearity with superconducting detectors M. Sc. Jan Philipp Höpker, UPB M. Sc. Matvei Ryabinin, UPB