1. Physics Department; FMIPA, Universitas Riau; Pekanbaru Indonesia
2. Multidisciplinary Research Center, Faculty of Science and Technology, Kasem Bundit University; Bangkok 10520 Thailand
3. Laser Centre, IBNU SINA ISIR, Universiti Teknologi Malaysia; 81310 Johor Bahru Malaysia
4. Faculty of Science; Universiti Teknologi Malaysia; 81310 Johor Bahru Malaysia
5. Department for Management of Science and Technology Development; Ton Duc Thang University; District 7 Ho Chi Minh City Vietnam
6. Faculty of Electrical & Electronics Engineering; Ton Duc Thang University; District 7 Ho Chi Minh City Vietnam