[1] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
[2] Natl Chiao Tung Univ, Dept Photon, Hsinchu 300, Taiwan
[3] Natl Chiao Tung Univ, Display Inst, Hsinchu 300, Taiwan
[4] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan
[5] Chang Gung Univ, Coll Engn, Taoyuan 333, Taiwan