1. KAUST Solar Centre (KSC), Division of Physical Science and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
2. Department of Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom
3. Biological and Environmental Science and Engineering, KAUST, Thuwal 23955-6900, Kingdom of Saudi Arabia
4. Department of Physics, National Technical University of Athens, GR15780 Athens, Greece