1. Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
2. ContiTech ChinaRubber & Plastics Technology Ltd, Changshu 215500, P. R. China
3. University of Science and Technology of China, Hefei 230026, P. R. China
4. Benecke Changshun Auto Trim Co., Ltd., Zhangjiagang 215632, P. R. China
5. Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
6. Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, P. R. China
7. Naval Research Institute, Beijing 102442, P. R. China