1. College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 P. R. China
2. Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430079 P. R. China
3. School of Printing and Packaging Wuhan University Wuhan 430072 P. R. China
4. Institute of Physical Chemistry and Abbe Center of Photonics Friedrich Schiller University Jena Helmholtzweg 4 07743 Jena Germany
5. Leibniz Institute for Photonic Technology Albert-Einstein-Strasse 9 07745 Jena Germany
6. Center of Analysis and Testing Wuhan University Wuhan 430074 P. R. China