Dr. Sheng Wu conducts research in sensors for PEER. These sensors are based on light-matter elastic (Mie scattering, Optical Coherence Tomography/OCT) and inelastic (absorption, RAMAN, Laser Induced Fluorescence/LIF) interactions, and on gas adsorption/desorption processes. Major projects include multiwavelength laser scattering and FM LIDAR, QCL-HWG IR isotope analyzer, high power tunable lasers and drift-free carbon polymer sensors. Sensors and techniques developed are applied to petroleum drilling and refinery, biological science and engineering.