State Key Laboratory of Applied Optics;
Changchun Institute of Optics;
Fine Mechanics and Physics;
Chinese Academy of Sciences;
130033 Changchun;
Jilin;
China.;
University of Chinese Academy of Sciences;
100049 Beijing;
China.;
Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education;
College of Physics;
Northeast Normal University;
130024 Changchun;
China.;
Center for Metamaterials and Integrated Plasmonics;
Duke University;
P.O.Box 90291;
Durham;
NC 27708;
USA;