1 Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands.
2 Laboratory for Soft and Living Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 1-5, Zurich, 8093, Switzerland.
3 LaserLaB, Biophotonics and Medical Imaging, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081, HV, Amsterdam, The Netherlands.
4 Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands. n.shahidzadeh@uva.nl.