1. Centre for Programmed MaterialsSchool of Materials Science and EngineeringNanyang Technological University Singapore 639798 Singapore
2. CINTRA CNRS/NTU/THALESUMI 3288, Research Techno Plaza Singapore 637553 Singapore
3. Institute of Modern OpticsKey Laboratory of Optical Information Science and TechnologyNankai University Tianjin 300350 China
4. School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China Chengdu 610054 China
5. School of Materials Science and EngineeringNankai University Tianjin 300350 China
6. Centre for Disruptive Photonic TechnologiesSchool of Physical and Mathematical Sciences and The Photonics InstituteNanyang Technological University Singapore 637371 Singapore
7. School of PhysicsNorthwest University Xi'an 710069 P. R. China
8. Key Laboratory of Optoelectronic Technology of Jiangsu ProvinceSchool of Physical Science and TechnologyNanjing Normal University Nanjing 210023 Jiangsu China
9. The MOE Key Laboratory of Weak Light Nonlinear PhotonicsTEDA Applied Physics Institute, and School of PhysicsNankai University Tianjin 300457 China