1. Wuhan National Laboratory for Optoelectronics
2. School of Optical and Electronic Information
3. Huazhong University of Science and Technology
4. Wuhan 430074
5. China
6. Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering
7. Fudan University
8. Shanghai, 200433
9. Ames Laboratory
10. U. S. Department of Energy and Department of Physics and Astronomy
11. Iowa State University
12. Ames
13. USA