Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase-only transmissive spatial light modulator based on tunable
  dielectric metasurface   Rapidly developing augmented reality (AR) and 3D holographic display
technologies require spatial light modulators (SLM) with high resolution and
viewing angle to be able to satisfy increasing customer demands. Currently
available SLMs, as well as their performance, are limited by their large pixel
sizes of the order of several micrometres. Further pixel size miniaturization
has been stagnant due to the persistent challenge to reduce the inter-pixel
crosstalk associated with the liquid crystal (LC) cell thickness, which has to
be large enough to accumulate the required 2{\pi} phase difference. Here, we
propose a concept of tunable dielectric metasurfaces modulated by a liquid
crystal environment, which can provide abrupt phase change and uncouple the
phase accumulation from the LC cell thickness, ultimately enabling the pixel
size miniaturization. We present a proof-of-concept metasurface-based SLM
device, configured to generate active beam steering with >35% efficiency and
large beam deflection angle of 11{\deg}, with LC cell thickness of only 1.5
{\mu}m, much smaller than conventional devices. We achieve the pixel size of
1.14 {\mu}m corresponding to the image resolution of 877 lp/mm, which is 30
times larger comparing to the presently available commercial SLM devices. High
resolution and viewing angle of the metasurface-based SLMs opens up a new path
to the next generation of near-eye AR and 3D holographic display technologies.

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The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int