Tailoring topological edge states with photonic crystal nanobeam cavities

Abstract The realization of topological edge states (TESs) in photonic systems has provided unprecedented opportunities for manipulating light in novel manners. The Su–Schrieffer–Heeger (SSH) model has recently gained significant attention and has been exploited in a wide range of photonic platforms...

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Autores principales:	Yongkang Gong, Liang Guo, Stephan Wong, Anthony J. Bennett, Sang Soon Oh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4747d8c8053645abbdfcba40c4ca791b
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spelling	oai:doaj.org-article:4747d8c8053645abbdfcba40c4ca791b2021-12-02T15:23:00ZTailoring topological edge states with photonic crystal nanobeam cavities10.1038/s41598-020-79915-62045-2322https://doaj.org/article/4747d8c8053645abbdfcba40c4ca791b2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79915-6https://doaj.org/toc/2045-2322Abstract The realization of topological edge states (TESs) in photonic systems has provided unprecedented opportunities for manipulating light in novel manners. The Su–Schrieffer–Heeger (SSH) model has recently gained significant attention and has been exploited in a wide range of photonic platforms to create TESs. We develop a photonic topological insulator strategy based on SSH photonic crystal nanobeam cavities. In contrast to the conventional photonic SSH schemes which are based on alternately tuned coupling strength in one-dimensional lattice, our proposal provides higher flexibility and allows tailoring TESs by manipulating mode coupling in a two-dimensional manner. We reveal that the proposed hole-array based nanobeams in a dielectric membrane can selectively tailor single or double TESs in the telecommunication region by controlling the coupling strength of the adjacent SSH nanobeams in both transverse and axial directions. Our finding provides an additional degree of freedom in exploiting the SSH model for integrated topological photonic devices and functionalities based on the well-established photonic crystal nanobeam cavity platforms.Yongkang GongLiang GuoStephan WongAnthony J. BennettSang Soon OhNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yongkang Gong Liang Guo Stephan Wong Anthony J. Bennett Sang Soon Oh Tailoring topological edge states with photonic crystal nanobeam cavities
description	Abstract The realization of topological edge states (TESs) in photonic systems has provided unprecedented opportunities for manipulating light in novel manners. The Su–Schrieffer–Heeger (SSH) model has recently gained significant attention and has been exploited in a wide range of photonic platforms to create TESs. We develop a photonic topological insulator strategy based on SSH photonic crystal nanobeam cavities. In contrast to the conventional photonic SSH schemes which are based on alternately tuned coupling strength in one-dimensional lattice, our proposal provides higher flexibility and allows tailoring TESs by manipulating mode coupling in a two-dimensional manner. We reveal that the proposed hole-array based nanobeams in a dielectric membrane can selectively tailor single or double TESs in the telecommunication region by controlling the coupling strength of the adjacent SSH nanobeams in both transverse and axial directions. Our finding provides an additional degree of freedom in exploiting the SSH model for integrated topological photonic devices and functionalities based on the well-established photonic crystal nanobeam cavity platforms.
format	article
author	Yongkang Gong Liang Guo Stephan Wong Anthony J. Bennett Sang Soon Oh
author_facet	Yongkang Gong Liang Guo Stephan Wong Anthony J. Bennett Sang Soon Oh
author_sort	Yongkang Gong
title	Tailoring topological edge states with photonic crystal nanobeam cavities
title_short	Tailoring topological edge states with photonic crystal nanobeam cavities
title_full	Tailoring topological edge states with photonic crystal nanobeam cavities
title_fullStr	Tailoring topological edge states with photonic crystal nanobeam cavities
title_full_unstemmed	Tailoring topological edge states with photonic crystal nanobeam cavities
title_sort	tailoring topological edge states with photonic crystal nanobeam cavities
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4747d8c8053645abbdfcba40c4ca791b
work_keys_str_mv	AT yongkanggong tailoringtopologicaledgestateswithphotoniccrystalnanobeamcavities AT liangguo tailoringtopologicaledgestateswithphotoniccrystalnanobeamcavities AT stephanwong tailoringtopologicaledgestateswithphotoniccrystalnanobeamcavities AT anthonyjbennett tailoringtopologicaledgestateswithphotoniccrystalnanobeamcavities AT sangsoonoh tailoringtopologicaledgestateswithphotoniccrystalnanobeamcavities
_version_	1718387321564299264

Tailoring topological edge states with photonic crystal nanobeam cavities

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