Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphene-Based Tunable Metasurface for All-angle Perfect Absorption   Motivated by the idea of smart metasurfaces, we will demonstrate a
graphene-based tunable absorber in which perfect absorption can be achieved for
all angles of incidence, only by tuning the Fermi level of graphene. We place
an unpatterned graphene sheet on a mushroom-type high impedance surface whose
resonant frequency is stable for all incident angles. For TM-polarization,
perfect absorption can be realized from normal to grazing incidence at the same
frequency when modulating the Fermi level of graphene from 0.18 eV to 1 eV.

18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat