Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.11851/7414
Title: | Robust transport of the edge modes along the photonic topological interfaces of different configurations | Authors: | Hajivandi, J. Kurt, H. |
Keywords: | Photonic topological insulators Double Dirac cone Quantum spin Hall effect Topological edge states Helical edge modes Honeycomb photonic crystals |
Publisher: | Elsevier | Abstract: | Two-dimensional photonic crystals made of six air holes on a core-shell dielectric material has been proposed to study the newly emerged photonic quantum spin Hall insulator. Specifically, radii modification of the air holes and core-shell without breaking time-reversal (TR) symmetry are supported by the C6 point group symmetry upon a proposed scheme. It is shown that multiple topological transitions from an ordinary insulator with zero spin Chern number (Cs) to a topological insulator with a non-zero Cs can be achieved by modifying the geometry of the photonic structure. Studying the two counter-propagating helical edge modes which have the opposite group velocities are of individual importance for various optical purposes like scattering-free waveguides protected to various defects, disorders and strong light-matter interactions. We show that topological edge states demonstrate slow light characteristics. The findings emphasize the fact that exploring topological phase transition can be applied as a unique approach for realizing light transport, robust energy transportation and slow light in integrated photonic circuits and devices. | URI: | https://doi.org/10.1016/j.physb.2020.412550 https://hdl.handle.net/20.500.11851/7414 |
ISSN: | 0921-4526 1873-2135 |
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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