1. The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
2. CAPES Foundation, Ministry of Education of Brazil, Brasília, Federal District 70040-020, Brazil
3. School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
4. Chair in Hybrid Nanosystems, Nanoinstitut München, Fakultät für Physik, Ludwig-Maximilians-Universität München, München 80539, Germany