Achieving maximum scattering circular dichroism through the excitation of anapole states within chiral Mie nanospheres

Haifeng Hu, Qiaoqiang Gan, and Qiwen Zhan
Phys. Rev. B 105, 245412 – Published 17 June 2022

Abstract

The chirality-dependent asymmetric light-matter interaction can be enhanced using various artificial photonic structures as well as engineered incident field. Compared with chiral photonic structures, the engineered optical field is less explored and recently recognized as a new regime in tailoring light-matter interaction. In this work, we demonstrate that weakly chiral spheres can exhibit the maximum scattering circular dichroism (CD) by tailoring the incident field to construct chirality-sensitive anapole states. By considering the chiral terms radiated from Mie nanospheres as perturbation, a multiscattering model is established to predict the chiroptical Mie scattering response of these nanospheres. This model provides a specific guideline to tailor the incident field to realize the upper limit of the achievable scattering CD.

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  • Received 16 January 2022
  • Revised 3 May 2022
  • Accepted 7 June 2022

DOI:https://doi.org/10.1103/PhysRevB.105.245412

©2022 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Haifeng Hu1,2,3, Qiaoqiang Gan4,*, and Qiwen Zhan1,2,3,†

  • 1School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2Zhangjiang Laboratory, 100 Haike Road, Shanghai 201204, China
  • 3Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 4Material Science Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia

  • *Corresponding author: qiaoqiang.gan@kaust.edu.sa
  • Corresponding author: qwzhan@usst.edu.cn

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Issue

Vol. 105, Iss. 24 — 15 June 2022

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