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Title: Split-ball resonator as a three-dimensional analogue of planar split-rings
Authors: Kuznetsov, A.I.
Miroshnichenko, A.E.
Hsing Fu, Y.
Viswanathan, V.
Rahmani, M.
Valuckas, V.
Ying Pan, Z.
Kivshar, Y.
Pickard, D.S. 
Luk'Yanchuk, B.
Issue Date: 16-Jan-2014
Citation: Kuznetsov, A.I., Miroshnichenko, A.E., Hsing Fu, Y., Viswanathan, V., Rahmani, M., Valuckas, V., Ying Pan, Z., Kivshar, Y., Pickard, D.S., Luk'Yanchuk, B. (2014-01-16). Split-ball resonator as a three-dimensional analogue of planar split-rings. Nature Communications 5 : -. ScholarBank@NUS Repository.
Abstract: Split-ring resonators are basic elements of metamaterials, which can induce a magnetic response in metallic nanosctructures. Tunability of such response up to the visible frequency range is still a challenge. Here we introduce the concept of the split-ball resonator and demonstrate the strong magnetic response in the visible for both gold and silver spherical plasmonic nanoparticles with nanometre scale cuts. We realize this concept experimentally by employing the laser-induced transfer method to produce near-perfect metallic spheres and helium ion beam milling to make cuts with the clean straight sidewalls and nanometre resolution. The magnetic resonance is observed at 600 nm in gold and at 565 nm in silver nanoparticles. This method can be applied to the structuring of arbitrary three-dimensional features on the surface of nanoscale resonators. It provides new ways for engineering hybrid resonant modes and ultra-high near-field enhancement. © 2014 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms4104
Appears in Collections:Staff Publications

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