1. School of Engineering Physics, Hanoi University of Science and Technology, No 1, Dai Co Viet Street, 100000 Hanoi, Viet Nam
2. Department of Physics, Faculty of Basic Sciences, University of Transport and Communications 100000 Hanoi, Viet Nam
3. School of Chemical Engineering, Hanoi University of Science and Technology, No 1, Dai Co Viet Street 100000 Hanoi, Viet Nam
4. Department of Electronics and Telecommunications, Saigon University, 273 An Duong Vuong Street, Ho Chi Minh City, Viet Nam