1. School of Physics
2. Northwest University
3. Xi'an 710069, China
4. Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education
5. School of Physical Science and Technology
6. Lanzhou University
7. Lanzhou 730000, China
8. College of Chemistry and Chemical Engineering
9. Shaanxi Research Design Institute of Petroleum and Chemical Industry
10. Institute of Photonics and Photo-Technology
11. Provinical Key Laboratory of Photoelectronic Technology