Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Split-ball resonator   We introduce a new concept of split-ball resonator and demonstrate a strong
magnetic dipole response for both gold and silver spherical plasmonic
nanoparticles with nanometer-scale cuts. Tunability of the magnetic dipole
resonance throughout the visible spectral range is demonstrated by changing the
depth and width of the nanoscale cut. We realize this novel concept
experimentally by employing the laser-induced transfer method to produce
near-perfect spheres and helium ion beam milling to make cuts with the
nanometer resolution. Due to high quality of the spherical particle shape
governed by strong surface tension forces during the laser transfer process and
clean, straight side walls of the cut made by helium ion milling, the magnetic
resonance is observed at 600 nm in gold and at 565 nm in silver nanoparticles.
Structuring arbitrary features on the surface of nanoscale spherical resonators
provides new ways for engineering hybrid resonant modes and ultra-high
near-field enhancement.

24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math