Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Terahertz metamaterials for linear polarization conversion and anomalous
  refraction   Polarization is one of the basic properties of electromagnetic waves
conveying valuable information in signal transmission and sensitive
measurements. Conventional methods for advanced polarization control impose
demanding requirements on material properties and attain only limited
performance. Here, we demonstrate ultrathin, broadband, and highly efficient
metamaterial-based terahertz polarization converters that are capable of
rotating a linear polarization state into its orthogonal one. Based on these
results we create metamaterial structures capable of realizing near-perfect
anomalous refraction. Our work opens new opportunities for creating high
performance photonic devices and enables emergent metamaterial functionalities
for applications in the technologically difficult terahertz frequency regime.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con