@article{fc5cb56698444abaa4902e25f82f0096,
title = "Magnetic assembly of gold core-shell necklace resonators",
abstract = "Gold core-shell necklace structures are assembled by inducing magnetic moments of gold-coated paramagnetic microspheres and a diamagnetic sphere using an external magnetic field. Sphere numbers in a necklace structure was tuned solely by controlling magnetic permeability of background medium. A necklace structure consisting of evenly spaced metal spheres or disks is known to be a good medium for a plasmonic resonance. Therefore, their optical properties were numerically studied. The electric field enhancement by a factor of 1800 was estimated in the gaps between adjacent spheres at a resonant wavelength. The wavelength-scaling strategies of our structures to visible wavelength are also discussed.",
author = "Kanna Aoki and Kentaro Furusawa and Takuo Tanaka",
note = "Funding Information: This work was supported by Extreme Photonics Project and FY2010 Incentive Research Grant provided by RIKEN, the Hitachi-Kurata Foundation, and Grant-in-Aid for Young Scientists (B) No. 23760056. Soken Chemical & Engineering Co., Ltd. kindly provided us gold core–shell microspheres. The authors wish to thank Dr. Shimazaki, Dr. Matsunuma, Dr. Kanzaki, and Dr. Usuki, at Hitachi Maxcell, Ltd. for technical supports and discussions on handling magnetic materials. K.A. is grateful to Professor Yellen at Duke University, Professor Nagasaki at Tsukuba University for providing valuable suggestions, and Dr. Yamazaki at Magnetic Materials Laboratory, RIKEN for assisting MPMS operation. ",
year = "2012",
month = apr,
day = "30",
doi = "10.1063/1.4706254",
language = "English",
volume = "100",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "18",
}