Antireflection spatiotemporal metamaterials
Reflection occurs when light impinges on an interface between two distinct media. Suppression of the reflection is of paramount significance to practical applications in information transfer and conversion. While technologies such as the Brewster effect and material coatings are widely adopted to el...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170301 |
| _version_ | 1826124980441579520 |
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| author | Yu, Youxiu Hu, Hao Zou, Linyang Yang, Qianru Lin, Xiao Li, Zhuo Gao, Lei Gao, Dongliang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Yu, Youxiu Hu, Hao Zou, Linyang Yang, Qianru Lin, Xiao Li, Zhuo Gao, Lei Gao, Dongliang |
| author_sort | Yu, Youxiu |
| collection | NTU |
| description | Reflection occurs when light impinges on an interface between two distinct media. Suppression of the reflection is of paramount significance to practical applications in information transfer and conversion. While technologies such as the Brewster effect and material coatings are widely adopted to eliminate the wave reflection from purely spatial or temporal interfaces, how to eliminate the reflection from a spatiotemporal interface remains elusive. Here, a new type of spatiotemporal metamaterial that functions as a global and generalized perspective of quarter-wave impedance transformers is presented. With the proper geometric design, the proposed spatiotemporal metamaterial can fully suppress the reflection, applicable to arbitrary modulation velocities. Importantly, the tunability of modulation velocity in the spatiotemporal metamaterial allows flexible frequency conversions in high efficiency, indicating that the spatiotemporal metamaterials are much more powerful than the purely spatial or temporal counterparts. These findings not only enhance the controllability of electromagnetic waves but also can be adapted to other classes of physical dynamics, including water surface waves, acoustic, and elastic. |
| first_indexed | 2024-10-01T06:29:35Z |
| format | Journal Article |
| id | ntu-10356/170301 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:29:35Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1703012023-09-06T02:52:51Z Antireflection spatiotemporal metamaterials Yu, Youxiu Hu, Hao Zou, Linyang Yang, Qianru Lin, Xiao Li, Zhuo Gao, Lei Gao, Dongliang School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Antireflection Frequency Conversions Reflection occurs when light impinges on an interface between two distinct media. Suppression of the reflection is of paramount significance to practical applications in information transfer and conversion. While technologies such as the Brewster effect and material coatings are widely adopted to eliminate the wave reflection from purely spatial or temporal interfaces, how to eliminate the reflection from a spatiotemporal interface remains elusive. Here, a new type of spatiotemporal metamaterial that functions as a global and generalized perspective of quarter-wave impedance transformers is presented. With the proper geometric design, the proposed spatiotemporal metamaterial can fully suppress the reflection, applicable to arbitrary modulation velocities. Importantly, the tunability of modulation velocity in the spatiotemporal metamaterial allows flexible frequency conversions in high efficiency, indicating that the spatiotemporal metamaterials are much more powerful than the purely spatial or temporal counterparts. These findings not only enhance the controllability of electromagnetic waves but also can be adapted to other classes of physical dynamics, including water surface waves, acoustic, and elastic. This work was financially supported by the National Natural Science Foundation of China (grant nos. 12174281, 92050104, 12274314), Natural Science Foundation of Jiangsu Province (grant no. BK20221240), and Suzhou Prospective Application Research Project (grant no. SYG202039). 2023-09-06T02:52:51Z 2023-09-06T02:52:51Z 2023 Journal Article Yu, Y., Hu, H., Zou, L., Yang, Q., Lin, X., Li, Z., Gao, L. & Gao, D. (2023). Antireflection spatiotemporal metamaterials. Laser and Photonics Reviews, 2300130-. https://dx.doi.org/10.1002/lpor.202300130 1863-8880 https://hdl.handle.net/10356/170301 10.1002/lpor.202300130 2-s2.0-85151953560 2300130 en Laser and Photonics Reviews © 2023 Wiley-VCH GmbH. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Antireflection Frequency Conversions Yu, Youxiu Hu, Hao Zou, Linyang Yang, Qianru Lin, Xiao Li, Zhuo Gao, Lei Gao, Dongliang Antireflection spatiotemporal metamaterials |
| title | Antireflection spatiotemporal metamaterials |
| title_full | Antireflection spatiotemporal metamaterials |
| title_fullStr | Antireflection spatiotemporal metamaterials |
| title_full_unstemmed | Antireflection spatiotemporal metamaterials |
| title_short | Antireflection spatiotemporal metamaterials |
| title_sort | antireflection spatiotemporal metamaterials |
| topic | Engineering::Electrical and electronic engineering Antireflection Frequency Conversions |
| url | https://hdl.handle.net/10356/170301 |
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