In this project the principal investigator (PI) and his team will bring together the field of silicon nanophotonics with the field of laser spectroscopy. The key question being addressed is: how can the powerful concepts of high-index-contrast nanophotonics be combined with the extreme accuracy of silicon technology and with the performance of hybrid silicon/III -V integration in order to create system -on -chip functionalities for advanced (bio-)spectroscopy. The answer to these questions holds the potential of revolutionizing the field of laser spectroscopy, in the sens that it can turn an advanced spectroscopy system into a small form -factor commodity system. This could have an enormous impact in applications such as point -of-care medical diagnosis and medical implants, monitoring of air, water and food quality, monitoring of mechanical and civil structures and as being a valuable tool for fundamental research.