1. Department
of Electrical and Electronics Engineering, Department of Physics,
UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey
2. School
of Electrical and Electronic Engineering, School of Physical and Mathematical
Sciences, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
3. Department
of Engineering Physics, Ankara University, Ankara 06100, Turkey