First of all, I would like to express my gratitude to Associate Professor Chin Mee Koy. His encouragement and guidance throughout the course of my study have been an important factor for me in completing my project. I am grateful to Professor Chua Soo Jin from the Institute of Material Research and Engineering (IMRE). His advice and time spent in the project discussion have been very motivating for the progress of my project. I also appreciate the invaluable assistance from Dr. Teng Jing Hua, who also from IMRE, for the generous sharing of his technical knowledge and research material with me. Special thanks to Associate Professor Mei Ting and Assistant Professor Tang Xiaohong at the same time, for their kind assistance in my project. I would like to thank Ms. Lee Shuh Ying as well, for the fruitful discussion and the sharing of her expertise in waveguide measurement. The project would not have completed without her helping hand. Much appreciation is expressed to Mr. Stevanus