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Title: Directional emission of the edge states from the photonic topological structure composed of two-dimensional honeycomb photonic crystals
Authors: Hajivandi, J.
Holcomb, M.
Kurt, H.
Keywords: Photonic Topological Insulators
Double Dirac cone
Honeycomb Photonic Crystals
Topological Edge States
Back-scattering Immune Transport
Issue Date: 2021
Publisher: Springer India
Abstract: In this work, we investigate a two-dimensional honeycomb photonic crystal (2D HPC) with C-6 symmetry point group, which is known to demonstrate a double Dirac cone at high symmetry point of the Brillion zone. We also designed two deformed PCs, by modifying the radius of the cylinders from the unit cell center reducing the symmetry from C-6 to the C-3 upsilon group. We find that this new structure exhibits the photonic topological edge states. Consequently, the topologically protected propagation of the edge states with the back scattering-immune feature is observed along the interfaces of the two deformed PCs without any defects or including cavities or bending. Furthermore, the directional surface modes exiting from the photonic topological insulators (PTIs) including various defects are investigated. As well, we explore the propagation and coupling of light through the coupled photonic topological insulators (CPTIs).
ISSN: 0972-8821
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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