Details
| Original language | English |
|---|---|
| Article number | L041304 |
| Journal | Physical Review B |
| Volume | 107 |
| Issue number | 4 |
| Publication status | Published - 31 Jan 2023 |
| Externally published | Yes |
Abstract
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 107, No. 4, L041304, 31.01.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Multipolar theory of bianisotropic response of meta-atoms
AU - Poleva, Maria
AU - Frizyuk, Kristina
AU - Baryshnikova, Kseniia
AU - Evlyukhin, Andrey
AU - Petrov, Mihail
AU - Bogdanov, Andrey
N1 - Publisher Copyright: © 2023 American Physical Society.
PY - 2023/1/31
Y1 - 2023/1/31
N2 - The bianisotropy of meta-atoms is usually associated with their nonlocal response and mutual coupling between electric and magnetic dipole moments induced by an incident field. In this Letter, we generalize the theory of bianisotropy beyond the dipole response to cases of arbitrary high-order multipole resonances. We demonstrate that bianisotropy is fully connected to the geometrical structure of meta-atoms and caused exclusively by the absence of their inversion symmetry, while the strength of the bianisotropy response grows normally with the size of a meta-atom. Applying a group theory analysis, we reveal the explicit criteria when the dipole approximation is enough for the correct description of bianisotropy and when accounting for higher-order multipoles is required. We consider a triangular prism as an illustrative example of a bianisotropic particle and show how accounting for higher-order multipoles prevents the violation of Onsager-Casimir conditions for kinetic coefficients appearing in the dipole approximation. The developed theory is an essential step toward a deeper insight into the scattering properties of nanoantennas and meta-atoms.
AB - The bianisotropy of meta-atoms is usually associated with their nonlocal response and mutual coupling between electric and magnetic dipole moments induced by an incident field. In this Letter, we generalize the theory of bianisotropy beyond the dipole response to cases of arbitrary high-order multipole resonances. We demonstrate that bianisotropy is fully connected to the geometrical structure of meta-atoms and caused exclusively by the absence of their inversion symmetry, while the strength of the bianisotropy response grows normally with the size of a meta-atom. Applying a group theory analysis, we reveal the explicit criteria when the dipole approximation is enough for the correct description of bianisotropy and when accounting for higher-order multipoles is required. We consider a triangular prism as an illustrative example of a bianisotropic particle and show how accounting for higher-order multipoles prevents the violation of Onsager-Casimir conditions for kinetic coefficients appearing in the dipole approximation. The developed theory is an essential step toward a deeper insight into the scattering properties of nanoantennas and meta-atoms.
UR - http://www.scopus.com/inward/record.url?scp=85147548404&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.107.L041304
DO - 10.1103/PhysRevB.107.L041304
M3 - Article
VL - 107
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 4
M1 - L041304
ER -