Abstract
In this work, we have demonstrated that the perforated Au-SiO2-Si multilayer nanoshells can support additional magnetic response besides electric response, where Si core provides additional magnetic response, unlike regular metal-dielectric-metal multilayer nanoshells exhibiting pure electric response. Dipole radiative enhancement is used to analyze magnetic and electric responses of the perforated Au-SiO2-Si multilayer nanoshells and the spectral features of nanoshells can be used to quantitatively characterize by the coupled oscillator model. The magnetic and electric responses of the perforated Au-SiO2-Si multilayer nanoshells are dependent sensitively on the incident angles of light due to the symmetry breaking and can be easily tuned by means of varying the geometry. The unique capability of the perforated Au-SiO2-Si multilayer nanoshells exhibiting magnetic-electric responses can provide various applications.
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