Describing Meta-Atoms Using the Exact Higher-Order Polarizability Tensors
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SCOPUS
- Title
- Describing Meta-Atoms Using the Exact Higher-Order Polarizability Tensors
- Authors
- JUNGHO, MUN; RHO, JUNSUK; SO, SUN AE; JAEHYUCK, JANG
- Date Issued
- 2020-05
- Publisher
- AMER CHEMICAL SOC
- Abstract
- In nanophotonics, multipole framework has become an indispensable theoretical tool for analyzing subwavelength meta-atoms and their radiation properties. This work presents higher-order exact dynamic polarizability (alpha) tensors, which can fully represent anisotropic meta-atoms with higher-order multipole transitions. By using the irreducible exact Cartesian multipoles and field components as the basis, the exact alpha-tensor rigorously reflects symmetry information on particles, including reciprocity. In addition, the exact alpha-tensor can be obtained from a T-matrix simply using basis transformation. Finally, we show that the description of meta-atoms using alpha-tensors incorporated with a multiple-scattering theory vastly extends the applicability of the multipole framework in nanophotonics, allowing accurate and efficient depiction of complicated, random, multiscale systems.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/104943
- DOI
- 10.1021/acsphotonics.9b01776
- ISSN
- 2330-4022
- Article Type
- Article
- Citation
- ACS PHOTONICS, vol. 7, no. 5, page. 1153 - 1162, 2020-05
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