Topological-charge-dependent dichroism and birefringence of optical vortices
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866929608060829696 |
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| author | Forbes, Kayn A. Green, Dale |
| author_facet | Forbes, Kayn A. Green, Dale |
| contents | Material anisotropy and chirality produce polarization-dependent light-matter interactions. Absorption leads to linear and circular dichroism, whereas elastic forward scattering produces linear and circular birefringence. Here we highlight a form of dichroism and birefringence whereby ordered generic media display locally different absorption and scattering of a focused vortex beam that depends upon the sign of the topological charge $\ell$. The light-matter interactions described in this work manifest purely through dominant electric-dipole coupling mechanisms and depend on the paraxial parameter to first-order. Previous topological-charge-dependent light-matter interactions required the significantly weaker higher-order multipole moments and are proportional to the paraxial parameter to second-order. The result represents a method of probing the nano-optics of advanced materials and the topological properties of structured light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_11992 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Topological-charge-dependent dichroism and birefringence of optical vortices Forbes, Kayn A. Green, Dale Optics Material anisotropy and chirality produce polarization-dependent light-matter interactions. Absorption leads to linear and circular dichroism, whereas elastic forward scattering produces linear and circular birefringence. Here we highlight a form of dichroism and birefringence whereby ordered generic media display locally different absorption and scattering of a focused vortex beam that depends upon the sign of the topological charge $\ell$. The light-matter interactions described in this work manifest purely through dominant electric-dipole coupling mechanisms and depend on the paraxial parameter to first-order. Previous topological-charge-dependent light-matter interactions required the significantly weaker higher-order multipole moments and are proportional to the paraxial parameter to second-order. The result represents a method of probing the nano-optics of advanced materials and the topological properties of structured light. |
| title | Topological-charge-dependent dichroism and birefringence of optical vortices |
| topic | Optics |
| url | https://arxiv.org/abs/2401.11992 |