Demonstration of negative refraction induced by synthetic gauge fields
Negative refraction is a counterintuitive wave phenomenon that has inspired the development of metamaterials and metasurfaces with negative refractive indices and surface phase discontinuities, respectively. Recent theories have proposed an alternative mechanism for negative refraction: Synthetic ga...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/160895 |
| _version_ | 1811690916912562176 |
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| author | Yang, Yihao Ge, Yong Li, Rujiang Lin, Xiao Jia, Ding Guan, Yi-Jun Yuan, Shou-Qi Sun, Hong-Xiang Chong, Yidong Zhang, Baile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Yang, Yihao Ge, Yong Li, Rujiang Lin, Xiao Jia, Ding Guan, Yi-Jun Yuan, Shou-Qi Sun, Hong-Xiang Chong, Yidong Zhang, Baile |
| author_sort | Yang, Yihao |
| collection | NTU |
| description | Negative refraction is a counterintuitive wave phenomenon that has inspired the development of metamaterials and metasurfaces with negative refractive indices and surface phase discontinuities, respectively. Recent theories have proposed an alternative mechanism for negative refraction: Synthetic gauge fields, induced by either dynamical modulation or motion, can shift a material’s dispersion in momentum space, forcing a positive refractive index medium to exhibit negative refraction above a certain threshold. However, this phenomenon has not previously been observed. Here, we report on the experimental demonstration of gauge field–induced negative refraction in a twisted bilayer acoustic metamaterial. The synthetic gauge fields arise in a projected two-dimensional geometry and can be continuously tuned by varying the wave number along the third dimension. Gauge field–induced waveguiding with backward-propagating modes is also demonstrated in a trilayer configuration. These results introduce a mechanism for performing wave manipulation in artificially engineered materials. |
| first_indexed | 2024-10-01T06:11:36Z |
| format | Journal Article |
| id | ntu-10356/160895 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:11:36Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1608952023-02-28T20:12:14Z Demonstration of negative refraction induced by synthetic gauge fields Yang, Yihao Ge, Yong Li, Rujiang Lin, Xiao Jia, Ding Guan, Yi-Jun Yuan, Shou-Qi Sun, Hong-Xiang Chong, Yidong Zhang, Baile School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Science::Physics Field-Induced Gauge Fields Negative refraction is a counterintuitive wave phenomenon that has inspired the development of metamaterials and metasurfaces with negative refractive indices and surface phase discontinuities, respectively. Recent theories have proposed an alternative mechanism for negative refraction: Synthetic gauge fields, induced by either dynamical modulation or motion, can shift a material’s dispersion in momentum space, forcing a positive refractive index medium to exhibit negative refraction above a certain threshold. However, this phenomenon has not previously been observed. Here, we report on the experimental demonstration of gauge field–induced negative refraction in a twisted bilayer acoustic metamaterial. The synthetic gauge fields arise in a projected two-dimensional geometry and can be continuously tuned by varying the wave number along the third dimension. Gauge field–induced waveguiding with backward-propagating modes is also demonstrated in a trilayer configuration. These results introduce a mechanism for performing wave manipulation in artificially engineered materials. Ministry of Education (MOE) Published version This work is funded by Singapore Ministry of Education grants MOE2016-T3-1-006 and MOE2019-T2-2-085; National Natural Science Foundation of China grants 62175215, 11774137, 12174159, and 51779107; and State Key Laboratory of Acoustics, Chinese Academy of Science grant SKLA202016. 2022-08-05T06:08:25Z 2022-08-05T06:08:25Z 2021 Journal Article Yang, Y., Ge, Y., Li, R., Lin, X., Jia, D., Guan, Y., Yuan, S., Sun, H., Chong, Y. & Zhang, B. (2021). Demonstration of negative refraction induced by synthetic gauge fields. Science Advances, 7(50), eabj2062-. https://dx.doi.org/10.1126/sciadv.abj2062 2375-2548 https://hdl.handle.net/10356/160895 10.1126/sciadv.abj2062 34878836 2-s2.0-85120917524 50 7 eabj2062 en MOE2016-T3-1-006 MOE2019-T2-2-085 Science Advances 10.21979/N9/T6YXVC © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). application/pdf |
| spellingShingle | Science::Physics Field-Induced Gauge Fields Yang, Yihao Ge, Yong Li, Rujiang Lin, Xiao Jia, Ding Guan, Yi-Jun Yuan, Shou-Qi Sun, Hong-Xiang Chong, Yidong Zhang, Baile Demonstration of negative refraction induced by synthetic gauge fields |
| title | Demonstration of negative refraction induced by synthetic gauge fields |
| title_full | Demonstration of negative refraction induced by synthetic gauge fields |
| title_fullStr | Demonstration of negative refraction induced by synthetic gauge fields |
| title_full_unstemmed | Demonstration of negative refraction induced by synthetic gauge fields |
| title_short | Demonstration of negative refraction induced by synthetic gauge fields |
| title_sort | demonstration of negative refraction induced by synthetic gauge fields |
| topic | Science::Physics Field-Induced Gauge Fields |
| url | https://hdl.handle.net/10356/160895 |
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