Bundgaard, F., Geschke, O., Zengerle, Roland and Ducrée, Jens ORCID: 0000-0002-0366-1897 (2007) A simple opto-fluidic switch detecting liquid filling in polymer-based microfluidic systems. In: TRANSDUCERS 2007 - International Solid-State Sensors, Actuators and Microsystems Conference, 10-14 June 2007, Lyon, France. ISBN 1-4244-0842-3