1. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2. Department of Physics and Academy for Advanced Interdisciplinary Studies, Southern University of Science & Technology, Shenzhen, Guangdong 518055, China
3. Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science & Technology, Shenzhen, Guangdong 518055, China