1. Gwangju Institute of Science and Technology, Advanced Photonics Research Institute, 1 Oryong-dong, Buk-gu, Gwangju 500-712, Republic of Korea
2. Khulna University, School of Science, Engineering, and Technology, Electronics and Communication Engineering Discipline, Khulna 9208, Bangladesh
3. Chosun University, Department of Photonic Engineering, 309 Pilmun-daero, Dong-gu, Gwangju 500-759, Republic of Korea
4. Korea Institute of Industrial Technology, 1110-9 Oryong-dong, Buk-gu, Gwangju 500-480, Republic of Korea