High Q-factor optical filter with high refractive index sensitivity based on hourglass-shaped photonic crystal ring resonator

In this paper, a novel hourglass-shaped ring resonator based on square lattice of GaAs in air is proposed for the design of a high sensitive all optical filter. The proposed structure guarantees a transmission efficiency of 100% and a high Q-factor of 2578.5. Moreover, some parameters variation such...

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Bibliographic Details
Published in:Optik (Stuttgart) 2020-02, Vol.202, p.163663, Article 163663
Main Authors: Rebhi, Sana, Najjar, Monia
Format: Article
Language:English
Subjects:
GaAs
Hourglass
Optical filter
Photonic crystal
Q-factor
Ring resonator
Sensitivity
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Summary:In this paper, a novel hourglass-shaped ring resonator based on square lattice of GaAs in air is proposed for the design of a high sensitive all optical filter. The proposed structure guarantees a transmission efficiency of 100% and a high Q-factor of 2578.5. Moreover, some parameters variation such as refractive index, rods radius and lattice constant are investigated in order to show their effects on the transmission efficiency, the Q-factor, the central wavelength and the bandwidth. The results demonstrate that the proposed structure is very sensitive upon the refractive index variation of the total structure, such that the refractive index sensitivity to the refractive index of total structure is Δλ/Δn = 3.9 nm /0.02.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2019.163663