Electromechanically reconfigurable terahertz stereo metasurfaces
Dynamic terahertz devices are vital for the next generation of wireless communication, sensing, and non-destructive imaging technologies. Metasurfaces have emerged as a paradigm-shifting platform, offering varied functionalities, miniaturization, and simplified fabrication compared to their 3D count...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/179485 |
| _version_ | 1826125345009434624 |
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| author | Prakash, Saurav Pitchappa, Prakash Agrawal, Piyush Jani, Hariom Zhao, Yunshan Kumar, Abhishek Thong, John Linke, Jian Ariando, Ariando Singh, Ranjan Venkatesan, Thirumalai |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Prakash, Saurav Pitchappa, Prakash Agrawal, Piyush Jani, Hariom Zhao, Yunshan Kumar, Abhishek Thong, John Linke, Jian Ariando, Ariando Singh, Ranjan Venkatesan, Thirumalai |
| author_sort | Prakash, Saurav |
| collection | NTU |
| description | Dynamic terahertz devices are vital for the next generation of wireless communication, sensing, and non-destructive imaging technologies. Metasurfaces have emerged as a paradigm-shifting platform, offering varied functionalities, miniaturization, and simplified fabrication compared to their 3D counterparts. However, the presence of in-plane mirror symmetry and reduced degree of freedom impose fundamental limitations on achieving advanced chiral response, beamforming, and reconfiguration capabilities. In this work, a platform composed of electrically actuated resonators that can be colossally reconfigured between planar and 3D geometries is demonstrated. To illustrate the platform, metadevices with 3D Split Ring Resonators are fabricated, wherein two counteracting driving forces are combined: i) folding induced by stress mismatch, which enables non-volatile state design and ii) unfolding triggered by the strain associated with insulator-to-metal transition in VO2, which facilitates volatile structural reconfiguration. This large structural reconfiguration space allows for resonance mode switching, widely tunable magnetic and electric polarizabilities, and increased frequency agility. Moreover, the unique properties of VO2, such as the hysteretic nature of its phase transition is harnessed to demonstrate a multi-state memory. Therefore, these VO2 integrated metadevices are highly attractive for the realization of 6G communication devices such as reconfigurable intelligent surfaces, holographic beam formers, and spatial light modulators. |
| first_indexed | 2024-10-01T06:35:08Z |
| format | Journal Article |
| id | ntu-10356/179485 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:35:08Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1794852024-08-05T02:04:02Z Electromechanically reconfigurable terahertz stereo metasurfaces Prakash, Saurav Pitchappa, Prakash Agrawal, Piyush Jani, Hariom Zhao, Yunshan Kumar, Abhishek Thong, John Linke, Jian Ariando, Ariando Singh, Ranjan Venkatesan, Thirumalai School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Physics Terahertz Vanadium dioxide Dynamic terahertz devices are vital for the next generation of wireless communication, sensing, and non-destructive imaging technologies. Metasurfaces have emerged as a paradigm-shifting platform, offering varied functionalities, miniaturization, and simplified fabrication compared to their 3D counterparts. However, the presence of in-plane mirror symmetry and reduced degree of freedom impose fundamental limitations on achieving advanced chiral response, beamforming, and reconfiguration capabilities. In this work, a platform composed of electrically actuated resonators that can be colossally reconfigured between planar and 3D geometries is demonstrated. To illustrate the platform, metadevices with 3D Split Ring Resonators are fabricated, wherein two counteracting driving forces are combined: i) folding induced by stress mismatch, which enables non-volatile state design and ii) unfolding triggered by the strain associated with insulator-to-metal transition in VO2, which facilitates volatile structural reconfiguration. This large structural reconfiguration space allows for resonance mode switching, widely tunable magnetic and electric polarizabilities, and increased frequency agility. Moreover, the unique properties of VO2, such as the hysteretic nature of its phase transition is harnessed to demonstrate a multi-state memory. Therefore, these VO2 integrated metadevices are highly attractive for the realization of 6G communication devices such as reconfigurable intelligent surfaces, holographic beam formers, and spatial light modulators. Agency for Science, Technology and Research (A*STAR) This work was supported by A*STAR MTC Programmatic under grant no.M22L1b0110. 2024-08-05T02:04:02Z 2024-08-05T02:04:02Z 2024 Journal Article Prakash, S., Pitchappa, P., Agrawal, P., Jani, H., Zhao, Y., Kumar, A., Thong, J., Linke, J., Ariando, A., Singh, R. & Venkatesan, T. (2024). Electromechanically reconfigurable terahertz stereo metasurfaces. Advanced Materials, e2402069-. https://dx.doi.org/10.1002/adma.202402069 0935-9648 https://hdl.handle.net/10356/179485 10.1002/adma.202402069 38815130 2-s2.0-85195192085 e2402069 en M22L1b0110 Advanced Materials © 2024 Wiley-VCH GmbH. All rights reserved. |
| spellingShingle | Physics Terahertz Vanadium dioxide Prakash, Saurav Pitchappa, Prakash Agrawal, Piyush Jani, Hariom Zhao, Yunshan Kumar, Abhishek Thong, John Linke, Jian Ariando, Ariando Singh, Ranjan Venkatesan, Thirumalai Electromechanically reconfigurable terahertz stereo metasurfaces |
| title | Electromechanically reconfigurable terahertz stereo metasurfaces |
| title_full | Electromechanically reconfigurable terahertz stereo metasurfaces |
| title_fullStr | Electromechanically reconfigurable terahertz stereo metasurfaces |
| title_full_unstemmed | Electromechanically reconfigurable terahertz stereo metasurfaces |
| title_short | Electromechanically reconfigurable terahertz stereo metasurfaces |
| title_sort | electromechanically reconfigurable terahertz stereo metasurfaces |
| topic | Physics Terahertz Vanadium dioxide |
| url | https://hdl.handle.net/10356/179485 |
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