1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
2. Henan Key Laboratory of Magnetoelectronic Information Functional Materials, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
3. Division of Physics and Applied Physics, School of Physical & Mathematical Sciences, Nanyang Technological University, 637371 Singapore
4. Centre for Disruptive Photonic Technologies, the Photonics Institute, Nanyang Technological University, 637371 Singapore