Department of Physics, Faculty of Science, National University of Singapore (NUS).

Department of Physics, Ewha Womans University, Seoul, Korea.

Department of Physics, Ewha Womans University, Seoul, Korea.

Institute of Physics, Vietnam Academy of Science and Technology.

Assistant Professor, Department of Physics, Faculty of Science, HKU.

Ho Chi Minh City University of Technology (HCMUT).

Ho Chi Minh City University of Education.

Faculty of Materials Science and Engineering, Phenikaa University.

University of Science – VNUHCM.

University of Technology - VNUHCM.