1. Collaborative Innovation Center of Light Manipulations and Applications in Universities of Shandong School of Physics and Electronics Shandong Normal University Jinan 250014 P. R. China
2. Key Laboratory of Luminescence and Optical Information Ministry of Education Beijing Jiaotong University Beijing 100044 P. R. China
3. College of Physics and Electronic Engineering Taishan University Taian Shandong 271021 P. R. China
4. School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. China
5. Organic Optoelectronic Materials Laboratory Department of Chemistry College of Science Korea University Seoul 02841 Republic of Korea