Electromechanically Reconfigurable Terahertz Stereo Metasurfaces

Page view(s)
5
Checked on Sep 12, 2024
Electromechanically Reconfigurable Terahertz Stereo Metasurfaces
Title:
Electromechanically Reconfigurable Terahertz Stereo Metasurfaces
Journal Title:
Advanced Materials
Keywords:
Publication Date:
30 May 2024
Citation:
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. Portico. https://doi.org/10.1002/adma.202402069
Abstract:
AbstractDynamic 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.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research, Singapore - MTC Programmatic Grant
Grant Reference no. : M22L1b0110
Description:
This is the peer reviewed version of the following 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. Portico. https://doi.org/10.1002/adma.202402069 , which has been published in final form atdoi.org/10.1002/adma.202402069. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
ISSN:
1521-4095
0935-9648
Files uploaded:

File Size Format Action
postprint.pdf 1.04 MB PDF Request a copy