[1] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 331717, Chungchungnam D, South Korea
[2] Korea Inst Ceram Engn & Technol, Future Convergence Ceram Div, Seoul 153801, South Korea
[3] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
[4] Korea Polytech Univ, Dept Nanoopt Engn, Gyeonggi 429793, South Korea