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. Department of Physics, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, Ward 4, District 5, Ho Chi Minh City, Vietnam