Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films
Abstract Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions, which avoid the nano-structuring to achieve hyperbolicity, can outperform their counterparts in artificial metasurfaces. Such plasmon polaritons are rare, but experimentally revealed recent...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2023-08-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-023-01244-w |
| _version_ | 1797556306616254464 |
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| author | Yuangang Xie Chong Wang Fucong Fei Yuqi Li Qiaoxia Xing Shenyang Huang Yuchen Lei Jiasheng Zhang Lei Mu Yaomin Dai Fengqi Song Hugen Yan |
| author_facet | Yuangang Xie Chong Wang Fucong Fei Yuqi Li Qiaoxia Xing Shenyang Huang Yuchen Lei Jiasheng Zhang Lei Mu Yaomin Dai Fengqi Song Hugen Yan |
| author_sort | Yuangang Xie |
| collection | DOAJ |
| description | Abstract Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions, which avoid the nano-structuring to achieve hyperbolicity, can outperform their counterparts in artificial metasurfaces. Such plasmon polaritons are rare, but experimentally revealed recently in WTe2 van der Waals thin films. Different from phonon polaritons, hyperbolic plasmon polaritons originate from the interplay of free carrier Drude response and interband transitions, which promise good intrinsic tunability. However, tunable in-plane hyperbolic plasmon polariton and its optical topological transition of the isofrequency contours to the elliptic topology in a natural material have not been realized. Here we demonstrate the tuning of the optical topological transition through Mo doping and temperature. The optical topological transition energy is tuned over a wide range, with frequencies ranging from 429 cm−1 (23.3 microns) for pure WTe2 to 270 cm−1 (37.0 microns) at the 50% Mo-doping level at 10 K. Moreover, the temperature-induced blueshift of the optical topological transition energy is also revealed, enabling active and reversible tuning. Surprisingly, the localized surface plasmon resonance in skew ribbons shows unusual polarization dependence, accurately manifesting its topology, which renders a reliable means to track the topology with far-field techniques. Our results open an avenue for reconfigurable photonic devices capable of plasmon polariton steering, such as canaling, focusing, and routing, and pave the way for low-symmetry plasmonic nanophotonics based on anisotropic natural materials. |
| first_indexed | 2024-03-10T17:00:56Z |
| format | Article |
| id | doaj.art-87f9c502fee04969a024350813e7c98a |
| institution | Directory Open Access Journal |
| issn | 2047-7538 |
| language | English |
| last_indexed | 2024-03-10T17:00:56Z |
| publishDate | 2023-08-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj.art-87f9c502fee04969a024350813e7c98a2023-11-20T10:58:25ZengNature Publishing GroupLight: Science & Applications2047-75382023-08-0112111110.1038/s41377-023-01244-wTunable optical topological transitions of plasmon polaritons in WTe2 van der Waals filmsYuangang Xie0Chong Wang1Fucong Fei2Yuqi Li3Qiaoxia Xing4Shenyang Huang5Yuchen Lei6Jiasheng Zhang7Lei Mu8Yaomin Dai9Fengqi Song10Hugen Yan11State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityCentre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of TechnologyNational Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and College of Physics, Nanjing UniversityCentre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of TechnologyState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityCenter for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing UniversityNational Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and College of Physics, Nanjing UniversityState Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan UniversityAbstract Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions, which avoid the nano-structuring to achieve hyperbolicity, can outperform their counterparts in artificial metasurfaces. Such plasmon polaritons are rare, but experimentally revealed recently in WTe2 van der Waals thin films. Different from phonon polaritons, hyperbolic plasmon polaritons originate from the interplay of free carrier Drude response and interband transitions, which promise good intrinsic tunability. However, tunable in-plane hyperbolic plasmon polariton and its optical topological transition of the isofrequency contours to the elliptic topology in a natural material have not been realized. Here we demonstrate the tuning of the optical topological transition through Mo doping and temperature. The optical topological transition energy is tuned over a wide range, with frequencies ranging from 429 cm−1 (23.3 microns) for pure WTe2 to 270 cm−1 (37.0 microns) at the 50% Mo-doping level at 10 K. Moreover, the temperature-induced blueshift of the optical topological transition energy is also revealed, enabling active and reversible tuning. Surprisingly, the localized surface plasmon resonance in skew ribbons shows unusual polarization dependence, accurately manifesting its topology, which renders a reliable means to track the topology with far-field techniques. Our results open an avenue for reconfigurable photonic devices capable of plasmon polariton steering, such as canaling, focusing, and routing, and pave the way for low-symmetry plasmonic nanophotonics based on anisotropic natural materials.https://doi.org/10.1038/s41377-023-01244-w |
| spellingShingle | Yuangang Xie Chong Wang Fucong Fei Yuqi Li Qiaoxia Xing Shenyang Huang Yuchen Lei Jiasheng Zhang Lei Mu Yaomin Dai Fengqi Song Hugen Yan Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films Light: Science & Applications |
| title | Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films |
| title_full | Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films |
| title_fullStr | Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films |
| title_full_unstemmed | Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films |
| title_short | Tunable optical topological transitions of plasmon polaritons in WTe2 van der Waals films |
| title_sort | tunable optical topological transitions of plasmon polaritons in wte2 van der waals films |
| url | https://doi.org/10.1038/s41377-023-01244-w |
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