National Natural Science Foundation of China(10979029,51172111,11204148);National Engineering Research Center for Optoelectronic Crystalline Materials(2007K08)
National Natural Science Foundation of China(10979029,51172111,11204148);National Engineering Research Centerfor Optoelectronic Crystalline Materials(2007k08)
supported by the National Natural Science Foundation of China(10979029,11204148 and 51172111);the Fundof National Engineering Research Center for Optoelectronic Crystalline Materials(2007k08)