1. Division of Electronics and Electrical Engineering, Dongguk University-Seoul, 30, Pildong-ro 1 gil, Jung-gu, Seoul 04620, Korea
2. Graphene Research Institute, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
3. Institute of Nano and Advanced Materials Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
4. Department of Energy Science, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, Korea
5. Department of Physics, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
6. Millimeter-wave Innovation Technology (MINT) Research Center, Dongguk University-Seoul, 30, Pildong-ro 1 gil, Jung-gu, Seoul 04620, Korea
7. Department of Energy Systems Research, Ajou University, 206, Worldcup-ro, Suwon 16499, Korea
8. Department of Electrical and Computer Engineering, Ajou University, 206, Worldcup-ro, Suwon 16499, Korea