| Affiliation: | a Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, South Korea;b Photonics Technology Research Institute, Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, South Korea;c Department of Physics, Gopal Krishna Gokhale College, Kolhapur 416 012, Maharashtra, India;d Development of Advanced Components & Materials, Korea Institute of Industrial Technology, Gwangju 500-480, South Korea |
