Gigantic Tellegen responses in metamaterials
Abstract Tellegen medium has long been a topic of debate, with its existence being contested over several decades. It was first proposed by Tellegen in 1948 and is characterized by a real-valued cross coupling between electric and magnetic responses, distinguishing it from the well-known chiral medi...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-55159-0 |
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| _version_ | 1841559187059900416 |
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| author | Qingdong Yang Xinhua Wen Zhongfu Li Oubo You Shuang Zhang |
| author_facet | Qingdong Yang Xinhua Wen Zhongfu Li Oubo You Shuang Zhang |
| author_sort | Qingdong Yang |
| collection | DOAJ |
| description | Abstract Tellegen medium has long been a topic of debate, with its existence being contested over several decades. It was first proposed by Tellegen in 1948 and is characterized by a real-valued cross coupling between electric and magnetic responses, distinguishing it from the well-known chiral medium that has imaginary coupling coefficients. Significantly, Tellegen responses are closely linked to axion dynamics, an extensively studied subject in condensed matter physics. Here, we report the realization of Tellegen metamaterials in the microwave region through a judicious combination of subwavelength metallic resonators, gyromagnetic materials, and permanent magnets. We observe the key signature of the Tellegen response – a Kerr rotation for reflected wave, while the polarization remains the same in the transmission direction. The retrieved effective Tellegen parameter is several orders of magnitude greater than that of natural materials. Our work opens door to a variety of nonreciprocal photonic devices and may provide a platform for studying axion physics. |
| format | Article |
| id | doaj-art-01c8a6431899416fb1c4a04a6bb2c8fa |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-01c8a6431899416fb1c4a04a6bb2c8fa2025-01-05T12:40:15ZengNature PortfolioNature Communications2041-17232025-01-011611710.1038/s41467-024-55159-0Gigantic Tellegen responses in metamaterialsQingdong Yang0Xinhua Wen1Zhongfu Li2Oubo You3Shuang Zhang4New Cornerstone Science Laboratory, Department of Physics, University of Hong KongNew Cornerstone Science Laboratory, Department of Physics, University of Hong KongNew Cornerstone Science Laboratory, Department of Physics, University of Hong KongNew Cornerstone Science Laboratory, Department of Physics, University of Hong KongNew Cornerstone Science Laboratory, Department of Physics, University of Hong KongAbstract Tellegen medium has long been a topic of debate, with its existence being contested over several decades. It was first proposed by Tellegen in 1948 and is characterized by a real-valued cross coupling between electric and magnetic responses, distinguishing it from the well-known chiral medium that has imaginary coupling coefficients. Significantly, Tellegen responses are closely linked to axion dynamics, an extensively studied subject in condensed matter physics. Here, we report the realization of Tellegen metamaterials in the microwave region through a judicious combination of subwavelength metallic resonators, gyromagnetic materials, and permanent magnets. We observe the key signature of the Tellegen response – a Kerr rotation for reflected wave, while the polarization remains the same in the transmission direction. The retrieved effective Tellegen parameter is several orders of magnitude greater than that of natural materials. Our work opens door to a variety of nonreciprocal photonic devices and may provide a platform for studying axion physics.https://doi.org/10.1038/s41467-024-55159-0 |
| spellingShingle | Qingdong Yang Xinhua Wen Zhongfu Li Oubo You Shuang Zhang Gigantic Tellegen responses in metamaterials Nature Communications |
| title | Gigantic Tellegen responses in metamaterials |
| title_full | Gigantic Tellegen responses in metamaterials |
| title_fullStr | Gigantic Tellegen responses in metamaterials |
| title_full_unstemmed | Gigantic Tellegen responses in metamaterials |
| title_short | Gigantic Tellegen responses in metamaterials |
| title_sort | gigantic tellegen responses in metamaterials |
| url | https://doi.org/10.1038/s41467-024-55159-0 |
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