Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Tailoring topological edge states with photonic crystal nanobeam cavities

Gong, Yongkang, Guo, Liang, Wong, Stephan, Bennett, Anthony J. ORCID: and Oh, Sang Soon ORCID: 2021. Tailoring topological edge states with photonic crystal nanobeam cavities. Scientific Reports 11 , 1055. 10.1038/s41598-020-79915-6

[thumbnail of s41598-020-79915-6.pdf]
PDF - Published Version
Available under License Creative Commons Attribution.

Download (2MB) | Preview


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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Nature Publishing Group
ISSN: 2045-2322
Date of First Compliant Deposit: 10 December 2020
Date of Acceptance: 9 December 2020
Last Modified: 05 Jan 2024 07:29

Citation Data

Cited 3 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics