**Acknowledgements**

This research has been supported by the WELCOME project 'Hybrid Nanostructures as a Stepping Stone towards Efficient Artificial Photosynthesis' funded by the Foundation for

Polish Science (FNP), by project DEC-2013/10/E/ST3/00034 from the National Science Center (NCN) and by the ORGANOMET project No: PBS2/A5/40/2014 from the National Research and Development Center (NCBiR). Izabela Kamińska acknowledges support by the Mobility Plus grant 1269/MOB/IV/2015/0 from the Polish Ministry of Science and Higher Education (MNiSW) and the START stipend awarded by the Foundation for Polish Science (FNP). We also acknowledge members of the Optics of Hybrid Nanostructures Group at the Institute of Physics, Nicolaus Copernicus University in Torun, in particular Dr. Dawid Piatkowski, Magdalena Twardowska, Justyna Grzelak, Marcin Szalkowski, and Kamil Wiwatowski for their excellent work and vital contribution.
