Widely tunable quantum cascade lasers based on filtered feedback through III-V/silicon hybrid integration Vrije Universiteit Brussel
Many gases that we want to detect or monitor in our environment have bands of absorption lines in the mid-infrared (midIR). These absorption lines form a "fingerprint" for a particular molecule, hence midIR spectroscopic sensing systems allow detecting the presence (and concentration) of specific molecules. These spectroscopic gas sensing systems find applications in environmental monitoring (e.g. car exhaust monitoring, air quality assessment), ...