[1] Inst Teknol Bandung, Fac Math & Nat Sci, Dept Phys, Bandung 40132, Indonesia
[2] Nihon Univ, Coll Sci & Technol, Tokyo, Tokyo 1010062, Japan
[3] Hiroshima Univ, Grad Sch Sci, Kagamiyama 1-3-1, Higashihiroshima 7398526, Japan
[4] Hiroshima Univ, Fac Sci, Kagamiyama 1-3-1, Higashihiroshima 7398526, Japan
[5] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Kagamiyama 2-313, Higashihiroshima 7390046, Japan
[6] Setsunan Univ, Fac Sci & Engn, Neyagawa, Osaka 5728508, Japan
[7] Konan Univ, Fac Sci & Engn, Kobe, Hyogo 6588501, Japan
[8] Ibaraki Coll, Natl Inst Technol, Ibaraki 3128508, Japan
[9] Natl Univ Singapore, Dept Phys, NUSNNI NanoCore, Singapore 117411, Singapore