Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;
Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;
Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;
Photonics Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia;
Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;
Photonics Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia;