Excitation of Symmetry Protected Modes in a Lithium Niobate Membrane Photonic Crystal for Sensing Applications
Résumé
Our theoretical study reveals the opportunity to develop an electric
field sensor based on the exploitation of the symmetry protected mode
(SPM) that we excite within an electro-optical material, namely lithium
niobate (LN). The SPM consists of a dark Fano-like resonance that
results from the combination of a discrete Bloch mode of a photonic
crystal (PhC) with a continuum mode of a membrane, both of them made in
LN. The dark character is linked to the structure geometry having a high
degree of symmetry. The SPM excitation is then made possible thanks to
an illumination under small oblique incidence, which breaks the symmetry
of the configuration. This results in several ultra-sensitive and
tunable Fano-like resonances with high quality factors up to 10
Domaines
Optique [physics.optics]
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https://hal.science/hal-03020561
Soumis le : lundi 23 novembre 2020-22:55:52
Dernière modification le : jeudi 13 avril 2023-09:26:12
Archivage à long terme le : jeudi 25 février 2021-13:41:17
Dates et versions
Identifiants
- HAL Id : hal-03020561 , version 1
Citer
Ayman Hoblos, Miguel Angel Suarez, Nadège Courjal, Maria-Pilar Bernal-Artajona, Fadi Baida. Excitation of Symmetry Protected Modes in a Lithium Niobate Membrane Photonic Crystal for Sensing Applications. OSA CONTINUUM, 2020, 3 (11), pp.3008-3018. ⟨hal-03020561⟩
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