This research is fueled by the need for compact, integrated solutions for spectroscopic sensor systems in the MIR for biomedical applications and environmental monitoring, since most molecules have  fingerprint  absorption lines in this wavelength range. The project is based on the use of high index contrast group IV waveguide systems. To extend the functionality of the photonic integrated circuit, my group will heterogeneously integrate other materials (III-V semiconductors, LiNbO3, MCT, chalcogenides, polymers) on the high index contrast waveguide system for particular optical functions.