Institution: | (1) Department of Physics, Shandong University, Jinan, 250100 Shandong, P.R. China;(2) School of Chemistry, Shandong University, Jinan, 250100 Shandong, P.R. China;(3) Department of Optoelectronics, Shandong University, Jinan, 250100 Shandong, P.R. China;(4) Department of Electronics Engineering, Shandong University, Jinan, 250100 Shandong, P.R. China |