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Extremely Broadband Topological Surface States in a Photonic Topological Metamaterial

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Title
Extremely Broadband Topological Surface States in a Photonic Topological Metamaterial
Author(s)
Minkyung Kim; Wenlong Gao; Dasol Lee; Taewoo Ha; Teun-Teun Kim; Shuang Zhang; Junsuk Rho
Publication Date
2019-10
Journal
ADVANCED OPTICAL MATERIALS, v.7, no.20, pp.1900900 -
Publisher
WILEY-VCH Verlag GmbH
Abstract
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimMetamaterials, artificially engineered materials consisting of subwavelength unit cells, have shown potentials in light manipulation with their extraordinary optical properties. Especially, photonic topological metamaterials possessing topologically protected surface states enable extremely robust control of light. Here, an extremely broadband topological phase in photonic topological metamaterials is demonstrated. In particular, topological surface states are observed for all the frequencies below a certain cut-off, originating from a double Weyl point at zero frequency. The extreme bandwidth and robustness of the photonic topological metamaterial are beneficial for practical applications such as one-way waveguide and photonic integrated systems but also advantageous in design and fabrication since the only necessary condition is to satisfy the effective hyperbolic and chiral properties, without entailing strict periodic arrangement
URI
https://pr.ibs.re.kr/handle/8788114/6565
ISSN
2195-1071
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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