1. Atomic Molecular and Optical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
2. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3. Computational Physics Lab K002, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
4. Department of Physics, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
5. Department of Physics, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany