1. State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and EngineeringJilin University Changchun 130012 China
2. Department of Chemistry and PhysicsLouisiana State University Shreveport LA 71115 USA
3. Department of Materials Science and EngineeringCentre for Functional Photonics (CFP)City University of Hong Kong Kowloon Hong Kong SAR