Surface wave photonic quasicrystal
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...
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sg-ntu-dr.10356-1441962023-02-28T19:53:41Z Surface wave photonic quasicrystal An, Yinbing Gao, Zhen Ouyang, Zhengbiao School of Physical and Mathematical Sciences Science::Physics Photonic Crystals Quasicrystals 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. Published version This work was sponsored by the National Natural Science Foundation of China (No. 11965009) and the Natural Science Foundation of Guangxi (Nos. 2018JJA170010 and 2018GXNSFAA281193). 2020-10-20T04:20:21Z 2020-10-20T04:20:21Z 2020 Journal Article An, Y., Gao, Z., & Ouyang, Z. (2020). Surface wave photonic quasicrystal. Applied Physics Letters, 116(15), 151104-. doi:10.1063/1.5139267 0003-6951 https://hdl.handle.net/10356/144196 10.1063/1.5139267 15 116 en Applied Physics Letters © 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). application/pdf |
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Science::Physics Photonic Crystals Quasicrystals An, Yinbing Gao, Zhen Ouyang, Zhengbiao Surface wave photonic quasicrystal |
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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. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences An, Yinbing Gao, Zhen Ouyang, Zhengbiao |
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Article |
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An, Yinbing Gao, Zhen Ouyang, Zhengbiao |
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An, Yinbing |
title |
Surface wave photonic quasicrystal |
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Surface wave photonic quasicrystal |
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Surface wave photonic quasicrystal |
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Surface wave photonic quasicrystal |
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Surface wave photonic quasicrystal |
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surface wave photonic quasicrystal |
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2020 |
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https://hdl.handle.net/10356/144196 |
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