1. Centre for Nuclear and Radiation Physics, Department of Physics; University of Surrey; Guildford Surrey GU2 7XH UK
2. Surrey Ion Beam Centre, Nodus Laboratory; University of Surrey; Guildford Surrey GU2 7XH UK
3. Integrated Lightwave Research Group, Department of Electrical Engineering, Faculty of Engineering; University of Malaya; Kuala Lumpur 50603 Malaysia
4. Faculty of Engineering; Multimedia University; 2010 Cyberjaya Selangor Malaysia
5. Department of Chemistry; University of Malaya; Kuala Lumpur 50603 Malaysia
6. Department of Physics; University of Malaya; Kuala Lumpur 50603 Malaysia