1. Laboratory
of Organic NanoPhotonics
and Key Laboratory of Functional Crystals and Laser Technology, Technical
Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing, P.
R. China, 100190
2. University of Chinese Academy of Sciences, No. 29, Zhongguancun East Road,
Beijing, P. R. China, 100190