Sketch of the Particle Detector (IMAGE) Optica Caption A new approach for particle analysis uses a laser beam to capture airborne particles and propel them through a hollow-core photonic crystal fiber. The particle diameter and refractive index can be retrieved by monitoring changes in fiber transmission. Credit Philip Russell, Max Planck Institute for the Science of Light Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.