Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excitation of Symmetry Protected Modes in a Lithium Niobate Membrane
  Photonic Crystal for Sensing Applications   Our theoretical study reveals the opportunity to develop an electric field
sensor basedon the exploitation of Symmetry Protected Mode (SPM) that we excite
within an electro-opticalmaterial, namely lithium niobate (LN). The SPM
consists of a dark Fano-like resonance thatresults from the combination of a
discrete Bloch mode of a Photonic Crystal (PhC) with acontinuum mode of a
membrane, both of them made in LN. The dark character is linked tothe structure
geometry having a high degree of symmetry. The SPM excitation is then
madepossible thanks to an illumination under small oblique incidence which
breaks the symmetry ofthe configuration. This results in several
ultra-sensitive and tunable Fano-like resonances withhigh quality factors up to
10^5 in the telecoms spectral range. Some of these resonances providemodes with
a highly confined electric field inside LN. This confinement allows the
enhancementof the electro-optic Pockels effect by a factor up to 4x10^5, thus
exacerbating the detectionsensitivity of the designed sensor.

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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ