Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes
Abstract Nanoelectromechanical systems (NEMS) based on atomically-thin tungsten diselenide (WSe2), benefiting from the excellent material properties and the mechanical degree of freedom, offer an ideal platform for studying and exploiting dynamic strain engineering and cross-scale vibration coupling...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2025-01-01
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| Series: | Microsystems & Nanoengineering |
| Online Access: | https://doi.org/10.1038/s41378-024-00827-w |
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| author | Bo Xu Zejuan Zhang Jiaze Qin Jiaqi Wu Luming Wang Jiankai Zhu Chenyin Jiao Wanli Zhang Juan Xia Zenghui Wang |
| author_facet | Bo Xu Zejuan Zhang Jiaze Qin Jiaqi Wu Luming Wang Jiankai Zhu Chenyin Jiao Wanli Zhang Juan Xia Zenghui Wang |
| author_sort | Bo Xu |
| collection | DOAJ |
| description | Abstract Nanoelectromechanical systems (NEMS) based on atomically-thin tungsten diselenide (WSe2), benefiting from the excellent material properties and the mechanical degree of freedom, offer an ideal platform for studying and exploiting dynamic strain engineering and cross-scale vibration coupling in two-dimensional (2D) crystals. However, such opportunity has remained largely unexplored for WSe2 NEMS, impeding exploration of exquisite physical processes and realization of novel device functions. Here, we demonstrate dynamic coupling between atomic lattice vibration and nanomechanical resonances in few-layer WSe2 NEMS. Using a custom-built setup capable of simultaneously detecting Raman and motional signals, we accomplish cross-scale mode coupling between the THz crystal phonon and MHz structural vibration, achieving GHz frequency tuning in the atomic lattice modes with a dynamic gauge factor of 61.9, the best among all 2D crystals reported to date. Our findings show that such 2D NEMS offer great promises for exploring cross-scale physics in atomically-thin semiconductors. |
| format | Article |
| id | doaj-art-befa60ac802142f3b45f64b0f0e84246 |
| institution | Kabale University |
| issn | 2055-7434 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Microsystems & Nanoengineering |
| spelling | doaj-art-befa60ac802142f3b45f64b0f0e842462025-01-26T12:38:20ZengNature Publishing GroupMicrosystems & Nanoengineering2055-74342025-01-011111810.1038/s41378-024-00827-wDynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranesBo Xu0Zejuan Zhang1Jiaze Qin2Jiaqi Wu3Luming Wang4Jiankai Zhu5Chenyin Jiao6Wanli Zhang7Juan Xia8Zenghui Wang9Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaSchool of Integrated Sciences and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of ChinaAbstract Nanoelectromechanical systems (NEMS) based on atomically-thin tungsten diselenide (WSe2), benefiting from the excellent material properties and the mechanical degree of freedom, offer an ideal platform for studying and exploiting dynamic strain engineering and cross-scale vibration coupling in two-dimensional (2D) crystals. However, such opportunity has remained largely unexplored for WSe2 NEMS, impeding exploration of exquisite physical processes and realization of novel device functions. Here, we demonstrate dynamic coupling between atomic lattice vibration and nanomechanical resonances in few-layer WSe2 NEMS. Using a custom-built setup capable of simultaneously detecting Raman and motional signals, we accomplish cross-scale mode coupling between the THz crystal phonon and MHz structural vibration, achieving GHz frequency tuning in the atomic lattice modes with a dynamic gauge factor of 61.9, the best among all 2D crystals reported to date. Our findings show that such 2D NEMS offer great promises for exploring cross-scale physics in atomically-thin semiconductors.https://doi.org/10.1038/s41378-024-00827-w |
| spellingShingle | Bo Xu Zejuan Zhang Jiaze Qin Jiaqi Wu Luming Wang Jiankai Zhu Chenyin Jiao Wanli Zhang Juan Xia Zenghui Wang Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes Microsystems & Nanoengineering |
| title | Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes |
| title_full | Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes |
| title_fullStr | Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes |
| title_full_unstemmed | Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes |
| title_short | Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe2 membranes |
| title_sort | dynamic tuning of terahertz atomic lattice vibration via cross scale mode coupling to nanomechanical resonance in wse2 membranes |
| url | https://doi.org/10.1038/s41378-024-00827-w |
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