[1] Natl Nano Devices Labs, Tainan 701, Taiwan
[2] Natl Cheng Kung Univ, Inst Nanotechnol & Microsyst Engn, Tainan 701, Taiwan
[3] Natl Cheng Kung Univ, Inst Microelect, Tainan 701, Taiwan
[4] Natl Cheng Kung Univ, Dept Elect Engn, Ctr Micro Nano Sci & Technol, Adv Optoelect Technol Ctr, Tainan 701, Taiwan
[5] Natl Taiwan Univ, Dept Elect Engn, Tainan 700, Taiwan
[6] Natl Nano Devices Labs, Tainan 741, Taiwan
[7] Natl Cheng Kung Univ, Inst Nanotechnol & Microsyst Engn, Tainan 701, Taiwan
[8] Cheng Shiu Univ, Dept Elect Engn, Kaohsiung 833, Taiwan