Choi Il-Gyun | Department of Electronics and Communication Engineering, Hanyang University, Ansan 426-791, Korea

Department of Electrical and Computer Engineering, Hanyang University, 1271 Sa 3-dong, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Korea

Department of Electronics and Communication Engineering, Hanyang University, Ansan 426-791, Korea

Deparment Of Chemistry Changwon National University

Department of Physics, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea

Department of Applied Physics and Electronics, Sangji Univeristy, Wonju, Gangwon 220-702, Korea

Department of Electronics and Communication Engineering, Hanyang University, Ansan, Gyeonggi 426-791, Korea

Department of Electronics and Communication Engineering, Hanyang University, Ansan, Gyeonggi 426-791, Korea

Department of Electronics and Communication Engineering, Hanyang University, Ansan, Gyeonggi 426-791, Korea

Department of Electronics and Communication Engineering, Hanyang University, Ansan 426-791, Korea

Department of Applied Physics, Hanyang University, Ansan, Gyeonggi 426-791, Korea