Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metamaterials with index ellipsoids at arbitrary k-points   We propose and investigate a new type of metamaterial structure composing of
several interpenetrating wire meshes. Calculated band structures show that they
exhibit index ellipsoids locating at nonzero k-point in long wavelength limit.
We can comprehend these quasistatic modes by Poison's equation and find these
modes do not rely on the detailed geometry of the wires but the connectivities
of the wires. We can engineer the locations of index ellipsoid by designing the
connectivities of the wire meshes.

29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org