Plasmonic Toroidal Response of four U-shaped resonant rings at Optical Frequencies

Yao-Wei Huang,Vassili Savinov,Vassili A Fedotov,Nikolay I Zheludev,Pin Chieh Wu,Din Ping Tsai,Wei Ting Chen,Yuan-Fong Chau

doi:10.1364/fio.2011.jtua37a

Plasmonic Toroidal Response of four U-shaped resonant rings at Optical Frequencies

Yao-Wei Huang, Vassili Savinov + Show 6 more

https://doi.org/10.1364/fio.2011.jtua37a

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Publication Date: Jan 1, 2011

Affiliation: National Taiwan University, University of Southampton, National Applied Research Laboratories, Research Center for Applied Science, Academia Sinica, Chien Hsin University of Science and Technology

#U-shaped Split-ring Resonators #Optical Frequencies + Show 8 more

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Abstract

The toroidal spectral responses of solenoid-like toroidal metamolecule integrated by four gold U-shaped split-ring resonators (SRRs) at optical frequencies are numerically studied. By analyzing the electromagnetic distribution in near-field region at the plasmonic resonances, we found toroidal and magnetic resonances generated by magnetic dipoles around the SRRs at frequency 112.3 THz and 122.1 THz, respectively. Downsizing the structure achieve observation of a plasmonic toroidal mode at optical frequencies in four U-shaped SRRs.

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