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Abstract
Applications such as microwave wireless communications, optical light fidelity, and light detection and ranging systems require advanced interfaces that can couple guided waves from in-plane sources into free space and manipulate the extracted free-space waves. Spatiotemporally modulated metasurfaces can control electromagnetic waves, but such systems are typically limited to free-space-only and waveguide-only platforms. Here we report a 1-bit space–time-coding metasurface antenna that can extract and mould guided waves into any desired free-space waves in both space and frequency domains. The waveguide-integrated metasurface antenna also provides a self-filtering phenomenon that overcomes the issue of sideband pollution found in traditional spatiotemporally modulated metasurfaces. To illustrate the capabilities of the approach, we use the metasurface antenna for high-efficiency frequency conversion, fundamental-frequency continuous beam scanning and independent control of multiple harmonics.
| Original language | English |
|---|---|
| Pages (from-to) | 808–819 |
| Number of pages | 12 |
| Journal | Nature Electronics |
| Volume | 5 |
| Issue number | 11 |
| Online published | 3 Nov 2022 |
| DOIs | |
| Publication status | Published - Nov 2022 |
Funding
This work was supported by the Hong Kong Research Grants Council of the Hong Kong SAR under grant T42-103/16-N (received by C.H.C.); the Guangdong Provincial Department of Science and Technology, China, under project no. 2020B1212030002 (received by C.H.C.); the Basic Scientific Center of Information Metamaterials of the National Natural Science Foundation of China under grant 6228810001 (received by T.J.C. and Q.C.); the National Key Research and Development Program of China under grants 2017YFA0700201, 2017YFA0700202, 2017YFA0700203 and 2018YFA0701904 (received by T.J.C. and Q.C.); the National Natural Science Foundation of China under grant 61731010 (received by Q.C.) and 62201139 (received by J.Y.D.); the 111 Project under grant 111-2-05 (received by T.J.C.); the Jiangsu Province Frontier Leading Technology Basic Research Project under grant BK20212002 (received by T.J.C.); the Fundamental Research Funds for the Central Universities under grants 2242022k30004 (received by Q.C.) and 2242022R10185 (received by J.Y.D.); and the National Science Foundation of China (NSFC) for Distinguished Young Scholars of China under grant 62225108 (received by Q.C.). We gratefully acknowledge K. F. Chan of the State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong) for his help in the metasurface fixture fabrication.
RGC Funding Information
- RGC-funded
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Dive into the research topics of 'Sideband-free space–time-coding metasurface antennas'. Together they form a unique fingerprint.Projects
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TBRS: A Compact System for Terahertz Imaging and Spectroscopy
CHAN, C. H. (Principal Investigator / Project Coordinator), LO, K. W. K. (Co-Principal Investigator), LUK, K. M. (Co-Principal Investigator), PUN, Y. B. E. (Co-Principal Investigator), Pang, S. (Co-Principal Investigator), SHAW, J. (Co-Principal Investigator), VELLAISAMY, A. L. R. (Co-Principal Investigator), CHAN, S. C. (Co-Investigator), DECROZE, C. (Co-Investigator), HO, J. C. Y. (Co-Investigator), JARRAHI, M. (Co-Investigator), LAM, Y. W. (Co-Investigator), LEE, E.-Y. J. (Co-Investigator), LEE, N. P. Y. (Co-Investigator), LEUNG, K. W. (Co-Investigator), LIU, H. (Co-Investigator), QU, S. (Co-Investigator), RENAUD, C. (Co-Investigator), Tong, K. (Co-Investigator), WANG, C. (Co-Investigator), WONG, H. (Co-Investigator), WONG, C. Y. A. (Co-Investigator), WONG, M. H. A. (Co-Investigator) & Wong, K. K. Y. (Co-Investigator)
1/01/17 → 30/06/23
Project: Research
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