Gyrotropy and permittivity sensing driven by toroidal response
Using a quasi-static model of a toroidal metamaterial we demonstrate analytically that simultaneous excitation of the magnetic and toroidal dipoles in an array of subwavelength toroidal solenoids results in gyrotropic behaviour resembling conventional optical activity. We derive the polarization eig...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/acb9b4 |
| _version_ | 1797748714061692928 |
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| author | K Marinov V A Fedotov |
| author_facet | K Marinov V A Fedotov |
| author_sort | K Marinov |
| collection | DOAJ |
| description | Using a quasi-static model of a toroidal metamaterial we demonstrate analytically that simultaneous excitation of the magnetic and toroidal dipoles in an array of subwavelength toroidal solenoids results in gyrotropic behaviour resembling conventional optical activity. We derive the polarization eigenstates of this uniaxial chiral toroidal metamaterial and show that such a medium is reciprocal, while the eigenstates are represented by two counter-rotating ellipses, one of which can be used for probing changes of the host permittivity in a manner exclusive to the toroidal metamaterial. We also show that the mechanism of permittivity sensing involving resonant toroidal response is fundamentally different from that, which has been exploited so far under the term ‘toroidal’. |
| first_indexed | 2024-03-12T16:08:47Z |
| format | Article |
| id | doaj.art-ae289115a6da4ec4815249cef9a7a49b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:08:47Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ae289115a6da4ec4815249cef9a7a49b2023-08-09T14:13:20ZengIOP PublishingNew Journal of Physics1367-26302023-01-0125202303010.1088/1367-2630/acb9b4Gyrotropy and permittivity sensing driven by toroidal responseK Marinov0V A Fedotov1https://orcid.org/0000-0003-4862-574XSTFC Daresbury Laboratory, ASTeC, Cockcroft Institute , Daresbury WA44AD, United KingdomOptoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton , Southampton, SO17 1BJ, United KingdomUsing a quasi-static model of a toroidal metamaterial we demonstrate analytically that simultaneous excitation of the magnetic and toroidal dipoles in an array of subwavelength toroidal solenoids results in gyrotropic behaviour resembling conventional optical activity. We derive the polarization eigenstates of this uniaxial chiral toroidal metamaterial and show that such a medium is reciprocal, while the eigenstates are represented by two counter-rotating ellipses, one of which can be used for probing changes of the host permittivity in a manner exclusive to the toroidal metamaterial. We also show that the mechanism of permittivity sensing involving resonant toroidal response is fundamentally different from that, which has been exploited so far under the term ‘toroidal’.https://doi.org/10.1088/1367-2630/acb9b4toroidal metamaterialgyrotropic metamaterialbirefringencepermittivity sensortoroidal sensing |
| spellingShingle | K Marinov V A Fedotov Gyrotropy and permittivity sensing driven by toroidal response New Journal of Physics toroidal metamaterial gyrotropic metamaterial birefringence permittivity sensor toroidal sensing |
| title | Gyrotropy and permittivity sensing driven by toroidal response |
| title_full | Gyrotropy and permittivity sensing driven by toroidal response |
| title_fullStr | Gyrotropy and permittivity sensing driven by toroidal response |
| title_full_unstemmed | Gyrotropy and permittivity sensing driven by toroidal response |
| title_short | Gyrotropy and permittivity sensing driven by toroidal response |
| title_sort | gyrotropy and permittivity sensing driven by toroidal response |
| topic | toroidal metamaterial gyrotropic metamaterial birefringence permittivity sensor toroidal sensing |
| url | https://doi.org/10.1088/1367-2630/acb9b4 |
| work_keys_str_mv | AT kmarinov gyrotropyandpermittivitysensingdrivenbytoroidalresponse AT vafedotov gyrotropyandpermittivitysensingdrivenbytoroidalresponse |