1. School of Physical Electronics
2. Joint Laboratory for Police Equipment Research
3. University of Electronic Science and Technology of China
4. Chengdu, P.R. China
5. Department of Applied Physics
6. Hunan University
7. Changsha 410082, P.R. China
8. School of Energy Science and Engineering
9. Chengdu 611731, P.R. China
10. Department of Physics and Astronomy
11. Vanderbilt University
12. Nashville, USA
13. Thin Film Centre
14. Scottish Universities Physics Alliance (SUPA)
15. University of the West of Scotland
16. Paisley, UK