Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin
Circular dichroism – the spin-selective absorption of light – finds diverse applications in medicine, antennas and microwave devices. In this work, we propose and experimentally demonstrate an ultrathin electronically reconfigurable chiral metasurface which exploits the intrinsic symmetries of the m...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-02-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0626 |
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| author | Khan Muhammad Ismail Khan Tayyab Ali Abdelbaky Moustafa Wong Alex M. H. |
| author_facet | Khan Muhammad Ismail Khan Tayyab Ali Abdelbaky Moustafa Wong Alex M. H. |
| author_sort | Khan Muhammad Ismail |
| collection | DOAJ |
| description | Circular dichroism – the spin-selective absorption of light – finds diverse applications in medicine, antennas and microwave devices. In this work, we propose and experimentally demonstrate an ultrathin electronically reconfigurable chiral metasurface which exploits the intrinsic symmetries of the meta-molecule to realize any spin absorption based on the handedness of the chirality chosen. We construct the left-chiral and right-chiral states by reconfiguring the meta-molecule into two enantiomeric states, which achieve strong circular dichroism exceeding 82 % at the design frequency of 9.5 GHz. The meta-molecule can be switched into a third (non-chiral) state which is isotropic and transparent. The achieved circular dichroism characteristics remain insensitive to incidence angles up to ±45°. The proposed reconfigurable chiral metasurface achieves left- and right- circular dichroism at the same frequency and with high efficiency, and is an attractive candidate for wide-ranging practical applications in imaging, wireless communication and medicine. |
| format | Article |
| id | doaj-art-a5c7f7afb99d4577ab0b2a152fdd2e39 |
| institution | DOAJ |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-a5c7f7afb99d4577ab0b2a152fdd2e392025-08-20T02:45:04ZengDe GruyterNanophotonics2192-86142025-02-0114339740610.1515/nanoph-2024-0626Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spinKhan Muhammad Ismail0Khan Tayyab Ali1Abdelbaky Moustafa2Wong Alex M. H.3Department of Electrical Engineering, 53025City University of Hong Kong, Hong KongSAR, ChinaDepartment of Electrical Engineering, 53025City University of Hong Kong, Hong KongSAR, ChinaDepartment of Electrical Engineering, 53025City University of Hong Kong, Hong KongSAR, ChinaDepartment of Electrical Engineering, 53025City University of Hong Kong, Hong KongSAR, ChinaCircular dichroism – the spin-selective absorption of light – finds diverse applications in medicine, antennas and microwave devices. In this work, we propose and experimentally demonstrate an ultrathin electronically reconfigurable chiral metasurface which exploits the intrinsic symmetries of the meta-molecule to realize any spin absorption based on the handedness of the chirality chosen. We construct the left-chiral and right-chiral states by reconfiguring the meta-molecule into two enantiomeric states, which achieve strong circular dichroism exceeding 82 % at the design frequency of 9.5 GHz. The meta-molecule can be switched into a third (non-chiral) state which is isotropic and transparent. The achieved circular dichroism characteristics remain insensitive to incidence angles up to ±45°. The proposed reconfigurable chiral metasurface achieves left- and right- circular dichroism at the same frequency and with high efficiency, and is an attractive candidate for wide-ranging practical applications in imaging, wireless communication and medicine.https://doi.org/10.1515/nanoph-2024-0626metasurfacemetamaterialchiralreconfigurablecircular dichroism |
| spellingShingle | Khan Muhammad Ismail Khan Tayyab Ali Abdelbaky Moustafa Wong Alex M. H. Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin Nanophotonics metasurface metamaterial chiral reconfigurable circular dichroism |
| title | Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin |
| title_full | Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin |
| title_fullStr | Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin |
| title_full_unstemmed | Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin |
| title_short | Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin |
| title_sort | realizing electronically reconfigurable intrinsic chirality from no absorption to maximal absorption of any desirable spin |
| topic | metasurface metamaterial chiral reconfigurable circular dichroism |
| url | https://doi.org/10.1515/nanoph-2024-0626 |
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