Theoretical Study of Tunable Optical Resonators in Periodic and Quasiperiodic One-Dimensional Photonic Structures Incorporating a Nematic Liquid Crystal

In this work, the transfer matrix method (TMM) is employed to investigate the optical properties of one-dimensional periodic and quasiperiodic photonic crystals containing nematic liquid crystal (NLC) layers. This structure is expressed as (ABC)J(CBA)J and made of alternated layers of isotropic diel...

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Bibliographic Details
Published in:Photonics 2021-05, Vol.8 (5), p.150
Main Authors: Trabelsi, Youssef, Belhadj, Walid, Ben Ali, Naim, Aly, Arafa H.
Format: Article
Language:English
Subjects:
BGO (crystal)
Crystal structure
Crystals
Electric fields
Lattice vibration
Liquid crystals
Nematic crystals
nematic liquid crystal (NLC)
Optical properties
Optical resonators
Periodic structures
Photonic band gaps
photonic crystal (PC)
Photonic crystals
quasicrystals
rudin shapiro sequence (RSS)
Silicon dioxide
Thickness
Transfer matrices
transfer matrix method (TMM)
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Summary:In this work, the transfer matrix method (TMM) is employed to investigate the optical properties of one-dimensional periodic and quasiperiodic photonic crystals containing nematic liquid crystal (NLC) layers. This structure is expressed as (ABC)J(CBA)J and made of alternated layers of isotropic dielectrics SiO2 (A), BGO (B) and nematic liquid crystal (C). The simulation study shows that the proposed ternary configuration exhibits tunable defect mode within the photonic band gap (PBG) that can be manipulated by adjusting the thicknesses of NLC layers in order of the periodic lattice. In addition, the optimized structure permits for strong confinement light giving rise to an optical microcavity. The application of an applied voltage into NLC layers enables improving the sensitivity by guiding the local defect mode. It has been also shown that by applying quasiperiodic inflation according to Rudin Shapiro Sequence (RSS) scheme to main periodic structure, several tunable resonant modes appear within the PBG. The presence of such sharp resonant peaks reflects that the quasiperiodic NLC-based structure behaves like multiple microcavites with strong light-matter coupling.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics8050150