Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metadevice for intensity modulation with sub-wavelength spatial
  resolution   Effectively continuous control over propagation of a beam of light requires
light modulation with pixelation that is smaller than the optical wavelength.
Here we propose a spatial intensity modulator with sub-wavelength resolution in
one dimension. The metadevice combines recent advances in reconfigurable
nanomembrane metamaterials and coherent all-optical control of metasurfaces. It
uses nanomechanical actuation of metasurface absorber strips placed near a
mirror in order to control their interaction with light from perfect absorption
to negligible loss, promising a path towards dynamic beam diffraction, light
focusing and holography without unwanted diffraction artefacts.

37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph