Ideal Kerker scattering by homogeneous spheres: the role of gain or loss
We investigate how the optical gain or loss (characterized by isotropic complex refractive indexes) influence the ideal Kerker scattering of exactly zero backward scattering. It was previously shown that, for non-magnetic homogeneous spheres with incident plane waves, either gain or loss prohibit id...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2022-08-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.13.73 |
| _version_ | 1811266976477085696 |
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| author | Qingdong Yang Weijin Chen Yuntian Chen Wei Liu |
| author_facet | Qingdong Yang Weijin Chen Yuntian Chen Wei Liu |
| author_sort | Qingdong Yang |
| collection | DOAJ |
| description | We investigate how the optical gain or loss (characterized by isotropic complex refractive indexes) influence the ideal Kerker scattering of exactly zero backward scattering. It was previously shown that, for non-magnetic homogeneous spheres with incident plane waves, either gain or loss prohibit ideal Kerker scattering, provided that only electric and magnetic multipoles of a specific order are present and contributions from other multipoles can all be made precisely zero. Here we reveal that, when two multipoles of a fixed order are perfectly matched in terms of both phase and magnitude, multipoles of at least the next two orders cannot possibly be tuned to be all precisely zero or even perfectly matched, and consequently cannot directly produce ideal Kerker scattering. Moreover, we further demonstrate that, when multipoles of different orders are simultaneously taken into consideration, loss or gain can serve as helpful rather than harmful contributing factors, for the elimination of backward scattering. |
| first_indexed | 2024-04-12T20:53:04Z |
| format | Article |
| id | doaj.art-edd41955b7b2481088ccd9b5d23b0450 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-04-12T20:53:04Z |
| publishDate | 2022-08-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-edd41955b7b2481088ccd9b5d23b04502022-12-22T03:17:04ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862022-08-0113182883510.3762/bjnano.13.732190-4286-13-73Ideal Kerker scattering by homogeneous spheres: the role of gain or lossQingdong Yang0Weijin Chen1Yuntian Chen2Wei Liu3School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China College for Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, P. R. China We investigate how the optical gain or loss (characterized by isotropic complex refractive indexes) influence the ideal Kerker scattering of exactly zero backward scattering. It was previously shown that, for non-magnetic homogeneous spheres with incident plane waves, either gain or loss prohibit ideal Kerker scattering, provided that only electric and magnetic multipoles of a specific order are present and contributions from other multipoles can all be made precisely zero. Here we reveal that, when two multipoles of a fixed order are perfectly matched in terms of both phase and magnitude, multipoles of at least the next two orders cannot possibly be tuned to be all precisely zero or even perfectly matched, and consequently cannot directly produce ideal Kerker scattering. Moreover, we further demonstrate that, when multipoles of different orders are simultaneously taken into consideration, loss or gain can serve as helpful rather than harmful contributing factors, for the elimination of backward scattering.https://doi.org/10.3762/bjnano.13.73gain and losskerker scatteringmie particle |
| spellingShingle | Qingdong Yang Weijin Chen Yuntian Chen Wei Liu Ideal Kerker scattering by homogeneous spheres: the role of gain or loss Beilstein Journal of Nanotechnology gain and loss kerker scattering mie particle |
| title | Ideal Kerker scattering by homogeneous spheres: the role of gain or loss |
| title_full | Ideal Kerker scattering by homogeneous spheres: the role of gain or loss |
| title_fullStr | Ideal Kerker scattering by homogeneous spheres: the role of gain or loss |
| title_full_unstemmed | Ideal Kerker scattering by homogeneous spheres: the role of gain or loss |
| title_short | Ideal Kerker scattering by homogeneous spheres: the role of gain or loss |
| title_sort | ideal kerker scattering by homogeneous spheres the role of gain or loss |
| topic | gain and loss kerker scattering mie particle |
| url | https://doi.org/10.3762/bjnano.13.73 |
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