1. School
of Electrical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, 136-701 Seoul, South Korea
2. IMEP-LAHC, Grenoble INP, Minatec, CS 50257, 38016 Grenoble, France
3. Sineurop Nanotech GmbH, Muenchner
Freiheit 6, 80802 München, Germany
4. School
of Electrical Engineering, Electronics and Computer Science, University of Liverpool, Ashton Street, Liverpool L69 3BX, United Kingdom