Properties of defect modes in cylindrical photonic crystals

In this research, we study the properties of the defect modes that arise in the photonic band gap of a cylindrical photonic crystal (CPC) by using the transfer matrix method in the cylindrical coordinates. We consider two defective CPCs stacked in symmetric and asymmetric geometries. We examine the...

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Bibliographic Details
Published inOptik (Stuttgart) Vol. 200; p. 163447
Main Author El-Naggar, Sahar A.
Format Journal Article
LanguageEnglish
Published Elsevier GmbH 01.01.2020
Subjects
Cylindrical photonic crystals
Defect mode
Refractive index sensor
Refractive index sensor
Cylindrical photonic crystals
Defect mode
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Summary:In this research, we study the properties of the defect modes that arise in the photonic band gap of a cylindrical photonic crystal (CPC) by using the transfer matrix method in the cylindrical coordinates. We consider two defective CPCs stacked in symmetric and asymmetric geometries. We examine the number of modes and their properties in the two CPCs structures. The dependencies of the modes on the azimuthal number and the inner radius of the CPC are also discussed. Numerical results show that the defect mode in the asymmetric CPCs has higher Q factor than those in the symmetric CPCs. Beside many potential optical communications and filtering applications, the structure may be a candidate for refractive index sensing with average sensitivity of 200 nm/RIU in the refractive index range from 1 to 1.6.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2019.163447