Berlin 2018 – scientific programme

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BP: Fachverband Biologische Physik

BP 15: Postersession III

BP 15.42: Poster

Tuesday, March 13, 2018, 14:00–16:00, Poster B

Optical detection, control and analysis of plastic microspheres in a microfluidic channel by a semiconductor laser — •Max von Witzleben, Florian Bödicker, and Stefan Breuer — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany

Micro-particles of sizes ranging from nanometres to micrometres and stemming from medications or cosmetic products contribute to the worldwide water pollution. They are hazardous as they readily enter the food chain of animals and humans. Hence, there is a strong need for micro-particle detection and filtering in fluids. Here, we present an all semiconductor photonic concept for detecting, relocating and dynamically studying plastic microspheres of sizes ranging from 3 µm to 8µm. By optical control, interferometric detection and analysis, static and dynamic properties of micro-particles are experimentally accessed. A simple model allows to reproduce the experimental findings with good quantitative agreement.