All-optical Hall effect by the dynamic toroidal moment in a cavity-based metamaterial

Zheng-Gao Dong, Jie Zhu, Xiaobo Yin, Jiaqi Li, Changgui Lu, and Xiang Zhang
Phys. Rev. B 87, 245429 – Published 24 June 2013

Abstract

Dynamic dipolar toroidal response is demonstrated by an optical plasmonic metamaterial composed of double disks. This response with a hotspot of localized E-field concentration is a well-behaved toroidal cavity mode that exhibits a large Purcell factor due to its deep-subwavelength mode volume. All-optical Hall effect (photovoltaic) is observed numerically attributed to the nonlinear phenomenon of unharmonic plasmon oscillations, which exhibits an interesting analogy with the magnetoelectric effect in multiferroic systems. The result shows a promising avenue to explore various intriguing optical phenomena associated with this dynamic toroidal moment.

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  • Received 6 December 2012

DOI:https://doi.org/10.1103/PhysRevB.87.245429

©2013 American Physical Society

Authors & Affiliations

Zheng-Gao Dong1,2,*, Jie Zhu2, Xiaobo Yin2, Jiaqi Li1, Changgui Lu2, and Xiang Zhang2

  • 1Physics Department and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
  • 25130 Etcheverry Hall, Nanoscale Science and Engineering Center, University of California, Berkeley, California 94720-1740, USA

  • *Corresponding author: zgdong@seu.edu.cn

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Vol. 87, Iss. 24 — 15 June 2013

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