Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Affine nonmagnetic transformation optics and its application to a
  practical bending adapter design   One of the bottlenecks that limit the transition of transformation-optics
devices from concepts to practical use is the non-unit magnetic permeability
generally required from a mathematical transformation. Simple renormalization
of permeability, as used in many previous designs and experiments, introduces
impedance mismatch and thus degrades the functional photonic performance. Here
we propose an area-preserving affine coordinate transformation as a general
method to solve this problem. Ideal transformation-optics functions can be
preserved while nonmagnetism is achieved. As a specific example, we illustrate
how to apply this affine method into the design of a two-dimensional
electromagnetic beam bending adapter. Concerns related to fabrication, such as
anisotropy degree and bending angles, are fully discussed. Our study is a
significant step toward practical use of ideal transformation optics devices
that can be implemented directly with existing dielectric materials.

18
The categories of this paper are: econ
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con