Programmable dual-band acoustic topological insulator with dynamically movable interface states
Topological acoustic interface states in one-dimensional (1D) acoustic topological insulators (ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike topological edge states that can propagate to deliver information in acoustic waveguides, the 0D topological interface s...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/171419 |
| _version_ | 1826118347883806720 |
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| author | Ge, Yong Shi, Bin-Jie Xia, Jian-Ping Sun, Hong-Xiang Yuan, Shou-Qi Xue, Haoran Zhang, Baile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Ge, Yong Shi, Bin-Jie Xia, Jian-Ping Sun, Hong-Xiang Yuan, Shou-Qi Xue, Haoran Zhang, Baile |
| author_sort | Ge, Yong |
| collection | NTU |
| description | Topological acoustic interface states in one-dimensional (1D) acoustic topological insulators (ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike topological edge states that can propagate to deliver information in acoustic waveguides, the 0D topological interface states generally cannot serve as information carriers to deliver information from one location to another due to their intrinsic localization. Here, we design and demonstrate a 1D ATI with a movable interface, enabling the 0D topological acoustic interface states to deliver information from one location to another. The ATI design is based on two types of elemental building blocks—denoted as “1” and “0”—which are programmable. These elements of 1 and 0, when periodically arranged, can form topologically distinct crystals, whose interface hosts acoustic topological interface states in two bandgaps simultaneously. Since these two types of elements can switch from each other with external control, a programmable 1D dual-band ATI can be constructed. By programming coding sequences of 1 and 0 elements, we can observe dynamically movable 0D topological interface states riding on a moving interface along the 1D ATI in both bandgaps. Our work opens an avenue to develop topological acoustic devices with programmable and dynamic functions, which may have a variety of potential applications in the fields of energy trapping, topological pumping, information processing, and sound communication. |
| first_indexed | 2024-10-01T04:41:55Z |
| format | Journal Article |
| id | ntu-10356/171419 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:41:55Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1714192023-10-30T15:34:42Z Programmable dual-band acoustic topological insulator with dynamically movable interface states Ge, Yong Shi, Bin-Jie Xia, Jian-Ping Sun, Hong-Xiang Yuan, Shou-Qi Xue, Haoran Zhang, Baile School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Science::Physics Acoustic Waveguides Dual Band Topological acoustic interface states in one-dimensional (1D) acoustic topological insulators (ATIs) are zero-dimensional (0D) topological states localized at an interface. Unlike topological edge states that can propagate to deliver information in acoustic waveguides, the 0D topological interface states generally cannot serve as information carriers to deliver information from one location to another due to their intrinsic localization. Here, we design and demonstrate a 1D ATI with a movable interface, enabling the 0D topological acoustic interface states to deliver information from one location to another. The ATI design is based on two types of elemental building blocks—denoted as “1” and “0”—which are programmable. These elements of 1 and 0, when periodically arranged, can form topologically distinct crystals, whose interface hosts acoustic topological interface states in two bandgaps simultaneously. Since these two types of elements can switch from each other with external control, a programmable 1D dual-band ATI can be constructed. By programming coding sequences of 1 and 0 elements, we can observe dynamically movable 0D topological interface states riding on a moving interface along the 1D ATI in both bandgaps. Our work opens an avenue to develop topological acoustic devices with programmable and dynamic functions, which may have a variety of potential applications in the fields of energy trapping, topological pumping, information processing, and sound communication. Ministry of Education (MOE) National Research Foundation (NRF) Published version This work was supported by the National Natural Science Foundation of China under Grant Nos. 12174159 and 12274183, the National Key Research and Development Program of China under Grant No. 2020YFC1512403, the Singapore National Research Foundation (NRF) under Grant No. NRF-CRP23-2019- 0007, and the Singapore Ministry of Education (MOE) under Grant No. MOE2019-T2-2-085. 2023-10-24T06:12:46Z 2023-10-24T06:12:46Z 2023 Journal Article Ge, Y., Shi, B., Xia, J., Sun, H., Yuan, S., Xue, H. & Zhang, B. (2023). Programmable dual-band acoustic topological insulator with dynamically movable interface states. Applied Physics Reviews, 10(3), 031403-1-031403-8. https://dx.doi.org/10.1063/5.0137946 1931-9401 https://hdl.handle.net/10356/171419 10.1063/5.0137946 2-s2.0-85165486293 3 10 031403-1 031403-8 en NRF-CRP23-2019-0007 MOE2019-T2-2-085 Applied Physics Reviews © 2023 Author(s). Published under an exclusive license by AIP Publishing. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1063/5.0137946 application/pdf |
| spellingShingle | Science::Physics Acoustic Waveguides Dual Band Ge, Yong Shi, Bin-Jie Xia, Jian-Ping Sun, Hong-Xiang Yuan, Shou-Qi Xue, Haoran Zhang, Baile Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title | Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title_full | Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title_fullStr | Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title_full_unstemmed | Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title_short | Programmable dual-band acoustic topological insulator with dynamically movable interface states |
| title_sort | programmable dual band acoustic topological insulator with dynamically movable interface states |
| topic | Science::Physics Acoustic Waveguides Dual Band |
| url | https://hdl.handle.net/10356/171419 |
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