Affiliation: | 1. Jin Hwa Ryu (gas96@etri.re.kr), Bong Kuk Lee (bklee32@etri.re.kr), Lee‐Mi Do (domi@etri.re.kr), Kang Bok Lee (kblee@etri.re.kr), Namkyoung Um (nkum@etri.re.kr), and Kyu‐Ha Baek (corresponding author, khbaek@etri.re.kr) are with the IT Convergence Technology Research Laboratory, ETRI, Deajeon, Rep. of Korea.;2. Woo‐Jin Lee (lwj@kopti.re.kr) is with the Nano‐Photonics Research Center, KOPTI, Gwangju, Jeonnam, Rep. of Korea. |