1. Photonics Research Centre, University of Malaya, Kuala Lumpur, Malaysia
2. Department of Physics, University of Malaya, Kuala Lumpur, Malaysia
3. Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya, Indonesia
4. School of Physics, Universiti Sains Malaysia, Pulau Pinang, Malaysia
5. Kulliyyah of Science, Universiti Islam Antarabangsa Malaysia, Kuantan, Malaysia
6. Faculty of Engineering, SEGi College Subang Jaya, Persiaran Kewajipan USJ1, UEP Subang Jaya, Selangor, Malaysia