1. Korea Photonics Technology Institute, Nano Photonics Research Center, 971-35 Wolchul-dong, Buk-gu, Gwangju 500-460, Republic of Korea
2. Newflex Technology Co., Ltd., 607BL 19Ho, Banwol Industrial Complex #631-1, Sunggok-Dong, Danwon-Gu, Ansan, Kyunggi-Do 425-839, Republic of Korea
3. Advanced Photonics Research Institute, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Republic of Korea