1. Atomic
Molecular and Optical Physics Research Group, 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 Applied Chemistry, Institute of Molecular Science, and Center for Interdisciplinary Molecular Science, National Chiao-Tung University, Hsinchu 30010 Taiwan
4. Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan