Affiliation: | [1]Key Laboratory for Physical Electronics and Devices of the Ministry of Education &: Shaanxi Key Lab of Information Photonic Technique, Xi'an 3iaotong University, Xi'an 710049; [2]Institute of Applied Physics, Xi'an University of Arts and Science, Xi'an 710065; [3]Institute of Education, Taiyuan University, Taiyuan 030001 |