1. Quy Nhon University, Faculty of Natural Sciences, Department of Chemistry, 170 An Duong Vuong, Quy Nhon, Vietnam
2. Quy Nhon University, Faculty of Natural Sciences, Department of Physics, 170 An Duong Vuong, Quy Nhon, Vietnam
3. KU Leuven, Department of Chemistry, Division of Molecular Imaging and Photonics, Celestijnenlaan 200F, Leuven B-3001, Belgium
4. KU Leuven, Department of Physics, Division of Quantum Solid State Physics, Celestijnenlaan 200D, Leuven B-3001, Belgium