1. Physics Study Program of Postgraduate School, Universitas Negeri Medan, Medan, Indonesia
2. Department of Physics, Universitas Negeri Medan, Medan, Indonesia
3. Physics Program, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand
4. Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand