1. Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry Capital Normal University Beijing 100048 P. R. China
2. Department of Physics and Center for Optoelectronics and Photonics Paderborn (CeOPP) Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
3. Tianjin Key Laboratory of Molecular Optoelectronic Science School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 P. R. China
4. Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique School of Electronic Science and Engineering Faculty of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China
5. Wyant College of Optical Sciences University of Arizona Tucson AZ 85721 United States
6. Institut Pascal PHOTON‐N2 Université Clermont Auvergne CNRS Clermont INP Clermont‐Ferrand F‐63000 France
7. Institut Universitaire de France (IUF) Paris 75231 France