1. Fraunhofer Institute for Photonic Microsystems (IPMS), Dresden, Germany
2. Microsystems Technology Laboratory, Royal Institute of Techology (KTH), Stockholm, Sweden
3. Department of Microsystems and Nanotechnology, Foundation for Scientific and Industrial Research (SINTEF), Oslo, Norway
4. Microsystems Technology (MST) Group, School of Electrical Engineering, Royal Institute of Techology (KTH), Stockholm, Sweden