1. Leibniz Institute of Photonic Technology (IPHT) Jena e.V; Jena Germany
2. Institute of Physical Chemistry and Abbe Center of Photonics; Friedrich-Schiller University Jena; Helmholtzweg Jena Germany
3. King's College London; Randall Division of Cell and Molecular Biophysics, NHH, Guy's Campus; London SE1 1UL U.K.