Defect mode and bandgap properties of a ternary photonic crystal with a nanocomposite defect layer

A one-dimensional ternary photonic crystal with a defect layer is investigated. It has the structure of silicon dioxide/silicon nitride/polystyrene (SiO 2 /Si 3 N 4 /(C 8 H 8 ) n ). A nanocomposite layer composed of silica and silver nanoparticles is placed at the middle of the photonic crystal as a...

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Bibliographic Details
Published in:Indian journal of physics 2023-01, Vol.97 (1), p.225-233
Main Authors: Doghmosh, Nael, Taya, Sofyan A., Nassar, Zaher M., Colak, Ilhami
Format: Article
Language:English
Subjects:
Astrophysics and Astroparticles
Crystal defects
Energy gap
Incidence angle
Nanocomposites
Nanoparticles
Original Paper
Photonic crystals
Physics
Physics and Astronomy
Polystyrene resins
Silicon dioxide
Silicon nitride
Silver
Thickness
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Summary:A one-dimensional ternary photonic crystal with a defect layer is investigated. It has the structure of silicon dioxide/silicon nitride/polystyrene (SiO 2 /Si 3 N 4 /(C 8 H 8 ) n ). A nanocomposite layer composed of silica and silver nanoparticles is placed at the middle of the photonic crystal as a defect layer. The transmission spectra of s-polarized (TE) and p-polarized (TM) waves through the photonic crystal are studied. The defect mode and the bandgap are both examined with the variation of the defect layer thickness, the number of periods, the filling factor of the silver nanoparticles in the nanocomposite and the angle of incidence. The results show that the number of defect modes and their wavelength positions are strongly dependent on the defect layer thickness and the filling factor. This is a significant phenomenon for potential applications of the photonic crystal as a multi-channel filter.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-021-02249-0