1. Department of Physics, University of California, Berkeley, California 94720, USA
2. Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion 8499000, Israel
3. Department of Physics, Ben-Gurion University of the Negev, Be’er Sheva 8410501, Israel