Scattering from anisotropic geometries of arbitrary shape is relatively difficult to interpret physically, involving the intricate interplay between material and geometric effects. Insights into complex scattering mechanisms are often enabled by modal methods that decompose the response into the well-understood multipolar resonances. Here, we extend the generalized normal mode expansion to lossy and anisotropic scatterers. Unique to the method is that it decomposes the total response of any anisotropic resonator into the modes of the corresponding isotropic resonator. This disentangles the material and geometric contributions to the scattering of any anisotropic resonator. Furthermore, the method can identify absorption and scattering resonances with separate sets of modes. We illustrate our method by considering an infinitely long cylinder with concentric metallic/dielectric layers, targeting the complex case of an effective hyperbolic response. We show that by scanning the material composition of the hyperbolic medium, we can achieve any desired scattering effect, including backscattering cancellation.
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21 March 2021
Research Article|
March 19 2021
Scattering by lossy anisotropic scatterers: A modal approach
Special Collection:
Plasmonics: Enabling Functionalities with Novel Materials
N. Kossowski
;
N. Kossowski
a)
1
UMI 3288 CINTRA, CNRS/NTU/THALES, Nanyang Technological University
, Research Techno Plaza, 50 Nanyang Drive, Singapore
6375532
School of Electronic and Electrical Engineering, Nanyang Technological University
, 50 Nanyang Ave., Singapore
639798
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Parry Y. Chen;
Parry Y. Chen
3
School of Electrical and Computer Engineering, Ben-Gurion University
, Beer-Sheva, Israel
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Q. J. Wang
;
Q. J. Wang
1
UMI 3288 CINTRA, CNRS/NTU/THALES, Nanyang Technological University
, Research Techno Plaza, 50 Nanyang Drive, Singapore
6375532
School of Electronic and Electrical Engineering, Nanyang Technological University
, 50 Nanyang Ave., Singapore
6397984
School of Physical and Mathematical Sciences, Nanyang Technological University
, 50 Nanyang Ave., Singapore
639798
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P. Genevet
;
P. Genevet
5
CNRS-Centre de Recherche sur l’Hetero-Epitaxie et ses Applications, Universite Cote d’Azur
, Rue Bernard Gregory, Sophia-Antipolis, Valbonne, 06560, France
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Yonatan Sivan
Yonatan Sivan
a)
3
School of Electrical and Computer Engineering, Ben-Gurion University
, Beer-Sheva, Israel
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Note: This paper is part of the Special Topic on Plasmonics: Enabling Functionalities with Novel Materials.
J. Appl. Phys. 129, 113104 (2021)
Article history
Received:
November 30 2020
Accepted:
February 24 2021
Connected Content
A companion article has been published:
Modal approach improves insight into scattering of lossy anisotropic materials
Citation
N. Kossowski, Parry Y. Chen, Q. J. Wang, P. Genevet, Yonatan Sivan; Scattering by lossy anisotropic scatterers: A modal approach. J. Appl. Phys. 21 March 2021; 129 (11): 113104. https://doi.org/10.1063/5.0039134
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