Photo-Acoustic Sensing

Photoacoustic (PA) effect is a light-matter interaction effect which involves acoustic wave generations from materials that absorb energy of light. It has been known as a sensitive spectroscopic technique for material studies including solids, liquids, and gases. PA spectroscopy has been applied to a wide range of applications such as chemical detections, material study, biomedical imaging and so on. The following picture shows a standoff chemical detection system operated outdoors.