1. Department of Convergence IT Engineering, Pohang University of Science and Technology, Pohang, South Korea
2. School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, South Korea
3. Device Research Center, Samsung Advanced Institute of Technology, Suwon, South Korea
4. Department of Convergence IT Engineering, the Department of Electrical Engineering, and the Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, South Korea