1. Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
2. School of Mechanical and IT Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
3. Department of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
4. Center for Research Facilities, Yeungnam University, Gyeongsan 38541, Republic of Korea