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Title: Surface wave photonic quasicrystal
Authors: An, Yinbing
Gao, Zhen
Ouyang, Zhengbiao
Keywords: Science::Physics
Issue Date: 2020
Source: An, Y., Gao, Z., & Ouyang, Z. (2020). Surface wave photonic quasicrystal. Applied Physics Letters, 116(15), 151104-. doi:10.1063/1.5139267
Journal: Applied Physics Letters
Abstract: In developing strategies for manipulating surface electromagnetic waves, it has been recently recognized that a complete forbidden bandgap can exist in a periodic surface-wave photonic crystal, which has subsequently produced various surface-wave photonic devices. However, it is not obvious whether such a concept can be extended to a quasi-periodic surface-wave system that lacks translational symmetry. Here, we experimentally demonstrate that a surface-wave photonic quasicrystal that lacks short-range order can also exhibit a forbidden bandgap for surface electromagnetic waves. The lower cutoff of this forbidden bandgap is mainly determined by the maximum separation between the nearest neighboring pillars. Point defects within this bandgap show distinct properties compared to a periodic photonic crystal in the absence of translational symmetry. A line-defect waveguide, which is crafted out of this surface-wave photonic quasicrystal by shortening a random row of metallic rods, is also demonstrated to guide and bend surface waves around sharp corners along an irregular waveguiding path.
ISSN: 0003-6951
DOI: 10.1063/1.5139267
Rights: © 2020 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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