Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gradient Nonlinear Pancharatnam-Berry Metasurfaces   We apply the Pancharatnam-Berry phase approach to plasmonic metasurfaces
loaded by highly nonlinear multi-quantum well substrates, establishing a
platform to control the nonlinear wavefront at will based on giant localized
nonlinear effects. We apply this approach to design flat nonlinear metasurfaces
for efficient second-harmonic radiation, including beam steering, focusing, and
polarization manipulation. Our findings open a new direction for nonlinear
optics, in which phase matching issues are relaxed, and an unprecedented level
of local wavefront control is achieved over thin devices with giant nonlinear
responses.

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The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn