1. Doctoral Program of Physics, Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Jawa Barat Indonesia
2. Department of Physics Institut Teknologi Bandung Bandung Jawa Barat Indonesia
3. Physics Division Cahaya Rancamaya Islamic Boarding School Bogor Jawa Barat Indonesia
4. Department of Physics Universitas Negeri Semarang Semarang, Jawa Tengah Indonesia
5. Faculty of Science Department of Physics Institut Teknologi Sumatera Jalan Terusan Ryacudu, Lampung Selatan Indonesia