Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams
Next-generation devices for low-latency and seamless communication are envisioned to revolutionize information processing, which would directly impact human lives, technologies, and societies. The ever-increasing demand for wireless data traffic can be fulfilled by the terahertz band, which has rece...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/161096 |
| _version_ | 1826112121381847040 |
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| author | Cong, Longqing Singh, Ranjan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Cong, Longqing Singh, Ranjan |
| author_sort | Cong, Longqing |
| collection | NTU |
| description | Next-generation devices for low-latency and seamless communication are envisioned to revolutionize information processing, which would directly impact human lives, technologies, and societies. The ever-increasing demand for wireless data traffic can be fulfilled by the terahertz band, which has received tremendous attention as the final frontier of the radio spectrum. However, attenuation due to atmospheric humidity and free-space path loss significantly limits terahertz signal propagation. High-gain antennas with directional radiation and reconfigurable beam steering are indispensable for loss compensation and terahertz signal processing, which are associated with spatial and temporal dimensions, respectively. Here, experimental demonstration of a spatiotemporal dielectric metasurface for unidirectional propagation and ultrafast spatial beam steering of terahertz waves is shown. The spatial dimension of the metasurface provides a solution to eliminate backscattering of collimated unidirectional propagation of the terahertz wave with steerable directionality. Temporal modulation of the spatial optical properties enables ultrafast reconfigurable beam steering. Silicon-based spatiotemporal devices amalgamate the rich physics of metasurfaces and technologies that are promising for overcoming the bottlenecks of future terahertz communication, such as high-speed and secure wireless data transmission, beamforming and ultrafast data processing. |
| first_indexed | 2024-10-01T03:01:48Z |
| format | Journal Article |
| id | ntu-10356/161096 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:01:48Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1610962022-08-15T07:30:13Z Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams Cong, Longqing Singh, Ranjan School of Physical and Mathematical Sciences The Photonics Institute Centre for Disruptive Photonic Technologies (CDPT) Science::Physics Dielectric Metamaterials Spatiotemporal Metasurfaces Next-generation devices for low-latency and seamless communication are envisioned to revolutionize information processing, which would directly impact human lives, technologies, and societies. The ever-increasing demand for wireless data traffic can be fulfilled by the terahertz band, which has received tremendous attention as the final frontier of the radio spectrum. However, attenuation due to atmospheric humidity and free-space path loss significantly limits terahertz signal propagation. High-gain antennas with directional radiation and reconfigurable beam steering are indispensable for loss compensation and terahertz signal processing, which are associated with spatial and temporal dimensions, respectively. Here, experimental demonstration of a spatiotemporal dielectric metasurface for unidirectional propagation and ultrafast spatial beam steering of terahertz waves is shown. The spatial dimension of the metasurface provides a solution to eliminate backscattering of collimated unidirectional propagation of the terahertz wave with steerable directionality. Temporal modulation of the spatial optical properties enables ultrafast reconfigurable beam steering. Silicon-based spatiotemporal devices amalgamate the rich physics of metasurfaces and technologies that are promising for overcoming the bottlenecks of future terahertz communication, such as high-speed and secure wireless data transmission, beamforming and ultrafast data processing. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) The authors acknowledge research funding support from the Ministry of Education, Singapore (AcRF Tier 1, Grant RG191/17, MOE2017-T2-1-110, and MOE2016-T3-1-006(S)) and the funding support from Advanced Manufacturing and Engineering (AME) Programmatic grant (A18A5b0056) by Agency for Science, Technology and Research (A*STAR). 2022-08-15T07:30:13Z 2022-08-15T07:30:13Z 2020 Journal Article Cong, L. & Singh, R. (2020). Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams. Advanced Materials, 32(28), 2001418-. https://dx.doi.org/10.1002/adma.202001418 0935-9648 https://hdl.handle.net/10356/161096 10.1002/adma.202001418 32468602 2-s2.0-85085473302 28 32 2001418 en G191/17 MOE2017-T2-1-110 MOE2016-T3-1-006(S) A18A5b0056 Advanced Materials © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. |
| spellingShingle | Science::Physics Dielectric Metamaterials Spatiotemporal Metasurfaces Cong, Longqing Singh, Ranjan Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title | Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title_full | Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title_fullStr | Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title_full_unstemmed | Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title_short | Spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| title_sort | spatiotemporal dielectric metasurfaces for unidirectional propagation and reconfigurable steering of terahertz beams |
| topic | Science::Physics Dielectric Metamaterials Spatiotemporal Metasurfaces |
| url | https://hdl.handle.net/10356/161096 |
| work_keys_str_mv | AT conglongqing spatiotemporaldielectricmetasurfacesforunidirectionalpropagationandreconfigurablesteeringofterahertzbeams AT singhranjan spatiotemporaldielectricmetasurfacesforunidirectionalpropagationandreconfigurablesteeringofterahertzbeams |