All-angle broadband ENZ metamaterials
A novel type of metamaterial is presented to produce broadband near-zero effective permittivity to a defined polarized probing electromagnetic wave with varying angles of incidence. The metamaterial has a uniaxial unit cell structure made up of symmetric periodic multilayer superlattices with a rota...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac7d02 |
| _version_ | 1827871094200074240 |
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| author | Lei Sun Yashan Lin Kin Wah Yu Guo Ping Wang |
| author_facet | Lei Sun Yashan Lin Kin Wah Yu Guo Ping Wang |
| author_sort | Lei Sun |
| collection | DOAJ |
| description | A novel type of metamaterial is presented to produce broadband near-zero effective permittivity to a defined polarized probing electromagnetic wave with varying angles of incidence. The metamaterial has a uniaxial unit cell structure made up of symmetric periodic multilayer superlattices with a rotational symmetry about the polarization of the probing electromagnetic wave. The unit cell is rigorously constructed based on the Bergman–Milton spectral representation of the effective permittivity, and its electrodynamic properties are theoretically verified by the eigenmode analysis, the band structure, the dispersion relation, and the isofrequency contours. The eigenmode analysis illustrates that the unit cell can be effectively regarded as a photonic crystal or a waveguide according to the incidence direction of the probing electromagnetic wave, and either of them is of the dynamic microstructure related to the frequency, which results in a broadband response. Meanwhile, the band structure, the dispersion relation, and the isofrequency contours show that the unit cell has the near-zero effective permittivity at all angles of incidence of the specified polarized probing electromagnetic wave. Finally, the reflection/transmission/absorption spectra to the prescribed polarization probing electromagnetic wave vividly reveal the all-angle broadband near-zero effective permittivity property of the metamaterial. |
| first_indexed | 2024-03-12T16:05:08Z |
| format | Article |
| id | doaj.art-f80f87d32c894a64b2fbfe8f08206075 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:05:08Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-f80f87d32c894a64b2fbfe8f082060752023-08-09T14:25:30ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124707301610.1088/1367-2630/ac7d02All-angle broadband ENZ metamaterialsLei Sun0https://orcid.org/0000-0002-5246-1373Yashan Lin1Kin Wah Yu2Guo Ping Wang3Institute of Microscale Optoelectronics, Shenzhen University , 3688 Nanhai Ave., Shenzhen 518060, People’s Republic of ChinaCollege of Electronics and Information Engineering, Shenzhen University , 3688 Nanhai Ave., Shenzhen 518060, People’s Republic of ChinaDepartment of Physics, The Chinese University of Hong Kong , Shatin, N.T., People’s Republic of ChinaInstitute of Microscale Optoelectronics, Shenzhen University , 3688 Nanhai Ave., Shenzhen 518060, People’s Republic of ChinaA novel type of metamaterial is presented to produce broadband near-zero effective permittivity to a defined polarized probing electromagnetic wave with varying angles of incidence. The metamaterial has a uniaxial unit cell structure made up of symmetric periodic multilayer superlattices with a rotational symmetry about the polarization of the probing electromagnetic wave. The unit cell is rigorously constructed based on the Bergman–Milton spectral representation of the effective permittivity, and its electrodynamic properties are theoretically verified by the eigenmode analysis, the band structure, the dispersion relation, and the isofrequency contours. The eigenmode analysis illustrates that the unit cell can be effectively regarded as a photonic crystal or a waveguide according to the incidence direction of the probing electromagnetic wave, and either of them is of the dynamic microstructure related to the frequency, which results in a broadband response. Meanwhile, the band structure, the dispersion relation, and the isofrequency contours show that the unit cell has the near-zero effective permittivity at all angles of incidence of the specified polarized probing electromagnetic wave. Finally, the reflection/transmission/absorption spectra to the prescribed polarization probing electromagnetic wave vividly reveal the all-angle broadband near-zero effective permittivity property of the metamaterial.https://doi.org/10.1088/1367-2630/ac7d02metamaterialssuperlatticeeffective medium |
| spellingShingle | Lei Sun Yashan Lin Kin Wah Yu Guo Ping Wang All-angle broadband ENZ metamaterials New Journal of Physics metamaterials superlattice effective medium |
| title | All-angle broadband ENZ metamaterials |
| title_full | All-angle broadband ENZ metamaterials |
| title_fullStr | All-angle broadband ENZ metamaterials |
| title_full_unstemmed | All-angle broadband ENZ metamaterials |
| title_short | All-angle broadband ENZ metamaterials |
| title_sort | all angle broadband enz metamaterials |
| topic | metamaterials superlattice effective medium |
| url | https://doi.org/10.1088/1367-2630/ac7d02 |
| work_keys_str_mv | AT leisun allanglebroadbandenzmetamaterials AT yashanlin allanglebroadbandenzmetamaterials AT kinwahyu allanglebroadbandenzmetamaterials AT guopingwang allanglebroadbandenzmetamaterials |