1. College of Science & Hunan Key Laboratory of Extreme Matter and Applications, National University of Defense Technology, Changsha, Hunan 410073, China
2. College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha, Hunan 410073, China
3. Nanhu Laser Laboratory, National University of Defense Technology, Changsha, Hunan 410073, China
4. Institute for Functional Intelligent Materials, National University of Singapore, Singapore 117544
5. Department of Materials Science and Engineering, National University of Singapore, Singapore 117575