Topological valley-locked waveguides with C4 impurity
Heterostructures play a pivotal role in the design of valley-locked waveguides, facilitating the manipulation of width as an additional degree of freedom. Through this design, we demonstrate the extension of the topological guided modes from the domain wall of topologically nontrivial valley photoni...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/179872 |
| _version_ | 1811691260257239040 |
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| author | Zhang, Hongxiang Xie, Rensheng Tao, Xiaofeng Gao, Jianjun |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhang, Hongxiang Xie, Rensheng Tao, Xiaofeng Gao, Jianjun |
| author_sort | Zhang, Hongxiang |
| collection | NTU |
| description | Heterostructures play a pivotal role in the design of valley-locked waveguides, facilitating the manipulation of width as an additional degree of freedom. Through this design, we demonstrate the extension of the topological guided modes from the domain wall of topologically nontrivial valley photonic crystals (VPCs) into the trivial VPCs. We propose a C4 impurity to control the states of the light wave transmission in topological valley-locked waveguides through the intervalley scattering of defects in Quantum Valley Spin Hall topological insulators. By rotating the C4 structure, the ON/OFF (0°/45°) state of the valley-locked waveguides can be controlled, effectively serving as a switch component. Furthermore, many unique applications could be devised based on the introduced impurity. Examples include the development of coding channels with arbitrary output ports and energy concentrators with enhanced secondary concentration. The proposed topological valley-locked waveguides with C4 impurity will be beneficial for on-chip integrated photonic networks. |
| first_indexed | 2024-10-01T06:17:04Z |
| format | Journal Article |
| id | ntu-10356/179872 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:17:04Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1798722024-09-02T15:35:08Z Topological valley-locked waveguides with C4 impurity Zhang, Hongxiang Xie, Rensheng Tao, Xiaofeng Gao, Jianjun School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Physics Heterostructure Valley-locked waveguides Heterostructures play a pivotal role in the design of valley-locked waveguides, facilitating the manipulation of width as an additional degree of freedom. Through this design, we demonstrate the extension of the topological guided modes from the domain wall of topologically nontrivial valley photonic crystals (VPCs) into the trivial VPCs. We propose a C4 impurity to control the states of the light wave transmission in topological valley-locked waveguides through the intervalley scattering of defects in Quantum Valley Spin Hall topological insulators. By rotating the C4 structure, the ON/OFF (0°/45°) state of the valley-locked waveguides can be controlled, effectively serving as a switch component. Furthermore, many unique applications could be devised based on the introduced impurity. Examples include the development of coding channels with arbitrary output ports and energy concentrators with enhanced secondary concentration. The proposed topological valley-locked waveguides with C4 impurity will be beneficial for on-chip integrated photonic networks. Published version This work was supported by China Postdoctoral Science Foundation under grant 2023M731827. 2024-08-28T06:22:46Z 2024-08-28T06:22:46Z 2024 Journal Article Zhang, H., Xie, R., Tao, X. & Gao, J. (2024). Topological valley-locked waveguides with C4 impurity. Nanophotonics, 13(19), 3727-3736. https://dx.doi.org/10.1515/nanoph-2024-0192 2192-8614 https://hdl.handle.net/10356/179872 10.1515/nanoph-2024-0192 2-s2.0-85196523786 19 13 3727 3736 en Nanophotonics © 2024 the author(s), published by De Gruyter. This work is licensed under the Creative Commons Attribution 4.0 International License. application/pdf |
| spellingShingle | Physics Heterostructure Valley-locked waveguides Zhang, Hongxiang Xie, Rensheng Tao, Xiaofeng Gao, Jianjun Topological valley-locked waveguides with C4 impurity |
| title | Topological valley-locked waveguides with C4 impurity |
| title_full | Topological valley-locked waveguides with C4 impurity |
| title_fullStr | Topological valley-locked waveguides with C4 impurity |
| title_full_unstemmed | Topological valley-locked waveguides with C4 impurity |
| title_short | Topological valley-locked waveguides with C4 impurity |
| title_sort | topological valley locked waveguides with c4 impurity |
| topic | Physics Heterostructure Valley-locked waveguides |
| url | https://hdl.handle.net/10356/179872 |
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