1. Department of Materials Science and Engineering National Yang Ming Chiao Tung University No.1001, University Rd., East Dist. Hsinchu City 30010 Taiwan (R.O.C.)
2. Department of Materials Science and Engineering Feng Chia University No. 100, Wenhwa Rd., Seatwen Dist. Taichung City 407802 Taiwan (R.O.C.)
3. Department of Physics National Cheng Kung University No.1, University Rd., East Dist. Tainan City 701 Taiwan (R.O.C.)
4. Department of Materials Science and Engineering National United University No. 2, Lienda, Miaoli City Miaoli County 360302 Taiwan (R.O.C.)
5. Center for the Intelligent Semiconductor Nano‐system Technology Research National Yang Ming Chiao Tung University 300 Hsinchu Taiwan