Affiliation: | (1) School of Science and Engineering, Reykjavik University, Menntavegur 1, 101 Reykjavik, Iceland;(2) Department of Electrical Engineering, University of Texas at Arlington, Box 19016, Arlington, TX 76019, USA;(3) Department of Physics, Hanyang University, 17 Hengdang-dong, Seongdong-gu, Seoul, 133-791, Republic of Korea |