Magnetic assembly of gold core-shell necklace resonators

Kanna Aoki, Kentaro Furusawa, Takuo Tanaka

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Article number181106
JournalApplied Physics Letters
Issue number18
Publication statusPublished - 2012 Apr 30

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Magnetic assembly of gold core-shell necklace resonators'. Together they form a unique fingerprint.

Cite this