Details
| Original language | English |
|---|---|
| Article number | 2301968 |
| Journal | Advanced optical materials |
| Volume | 12 |
| Issue number | 7 |
| Publication status | Published - 13 Mar 2024 |
Abstract
Symmetry breaking plays a crucial role in understanding the fundamental physics underlying numerous physical phenomena, including the electromagnetic response in resonators, giving rise to intriguing effects such as directional light scattering, supercavity lasing, and topologically protected states. This work demonstrates that adding a small fraction of lossy metal (as low as 1 × 10−6 in volume) to a lossless dielectric resonator breaks inversion symmetry (IS), thereby lifting its degeneracy, leading to a strong bianisotropic response. In the case of the metasurface composed of such resonators, this effect leads to unidirectional perfect absorption while maintaining nearly perfect reflection from the opposite direction. It has developed more general Onsager-Casimir relations for the polarizabilities of particle arrays, taking into account the contributions of quadrupoles, which shows that bianisotropy is not solely due to dipoles, but also involves high-order multipoles. The experimental validation demonstrates an extremely thin terahertz-perfect absorber with a wavelength-to-thickness ratio of up to 25,000, where the material thickness is only 2% of the theoretical minimum thickness dictated by the fundamental limit. The findings can pave a new route to design devices for applications involving optical-to-heat conversion processes.
Keywords
- asymmetric absorption, dielectric metasurfaces, multipole bianisotropy, thin film
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Advanced optical materials, Vol. 12, No. 7, 2301968, 13.03.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Extremely Thin Perfect Absorber by Generalized Multipole Bianisotropic Effect
AU - Ma, Hao
AU - Evlyukhin, Andrey B.
AU - Miroshnichenko, Andrey E.
AU - Zhu, Fengjie
AU - Duan, Siyu
AU - Wu, Jingbo
AU - Zhang, Caihong
AU - Chen, Jian
AU - Jin, Biaobing
AU - Padilla, Willie J.
AU - Fan, Kebin
N1 - Acknowledgements This work was supported by the National Natural Science Foundationof China (62275118, 62288101), the Fundamental Research Funds for the Central Universities, and the Research fund for Jiangsu Key Labora-tory of Advanced Techniques for Manipulating Electromagnetic Waves.A.B.E. acknowledged support from the Deutsche Forschungsgemein-schaft (DFG, German Research Foundation) under Germany’s ExcellenceStrategy within the Cluster of Excellence PhoenixD (EXC 2122, Project IDNo. 390833453). The work of A.E.M. was supported by the Australian Re-search Council (DP200101353). W.J.P. acknowledged support from the USDepartment of Energy (DOE) (DESC0014372).
PY - 2024/3/13
Y1 - 2024/3/13
N2 - Symmetry breaking plays a crucial role in understanding the fundamental physics underlying numerous physical phenomena, including the electromagnetic response in resonators, giving rise to intriguing effects such as directional light scattering, supercavity lasing, and topologically protected states. This work demonstrates that adding a small fraction of lossy metal (as low as 1 × 10−6 in volume) to a lossless dielectric resonator breaks inversion symmetry (IS), thereby lifting its degeneracy, leading to a strong bianisotropic response. In the case of the metasurface composed of such resonators, this effect leads to unidirectional perfect absorption while maintaining nearly perfect reflection from the opposite direction. It has developed more general Onsager-Casimir relations for the polarizabilities of particle arrays, taking into account the contributions of quadrupoles, which shows that bianisotropy is not solely due to dipoles, but also involves high-order multipoles. The experimental validation demonstrates an extremely thin terahertz-perfect absorber with a wavelength-to-thickness ratio of up to 25,000, where the material thickness is only 2% of the theoretical minimum thickness dictated by the fundamental limit. The findings can pave a new route to design devices for applications involving optical-to-heat conversion processes.
AB - Symmetry breaking plays a crucial role in understanding the fundamental physics underlying numerous physical phenomena, including the electromagnetic response in resonators, giving rise to intriguing effects such as directional light scattering, supercavity lasing, and topologically protected states. This work demonstrates that adding a small fraction of lossy metal (as low as 1 × 10−6 in volume) to a lossless dielectric resonator breaks inversion symmetry (IS), thereby lifting its degeneracy, leading to a strong bianisotropic response. In the case of the metasurface composed of such resonators, this effect leads to unidirectional perfect absorption while maintaining nearly perfect reflection from the opposite direction. It has developed more general Onsager-Casimir relations for the polarizabilities of particle arrays, taking into account the contributions of quadrupoles, which shows that bianisotropy is not solely due to dipoles, but also involves high-order multipoles. The experimental validation demonstrates an extremely thin terahertz-perfect absorber with a wavelength-to-thickness ratio of up to 25,000, where the material thickness is only 2% of the theoretical minimum thickness dictated by the fundamental limit. The findings can pave a new route to design devices for applications involving optical-to-heat conversion processes.
KW - asymmetric absorption
KW - dielectric metasurfaces
KW - multipole bianisotropy
KW - thin film
UR - http://www.scopus.com/inward/record.url?scp=85177225138&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2308.07139
DO - 10.48550/arXiv.2308.07139
M3 - Article
AN - SCOPUS:85177225138
VL - 12
JO - Advanced optical materials
JF - Advanced optical materials
SN - 2195-1071
IS - 7
M1 - 2301968
ER -