1. CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
2. CAS Center for Excellence in Nanoscience
3. National Center for Nanoscience and Technology
4. Beijing 100190
5. P. R. China
6. State Key Laboratory of Superlattices and Microstructures
7. Institute of Semiconductors
8. Chinese Academy of Sciences
9. Beijing 100083
10. Department of Quantum and Energy Materials
11. International Iberian Nanotechnology Laboratory (INL)
12. Braga 4715-330
13. Portugal
14. Department of Physics
15. Henan Normal University
16. Xinxiang 453007
17. The MOE Key Laboratory of Weak-Light Nonlinear Photonics
18. TEDA Institute of Applied Physics
19. Nankai University
20. Tianjin 300457