Emergence of Fano response in trimer structure with asymmetric permittivity

In this paper, we discuss the Fano response from a hybrid trimer composed of gold and silicon nanospheres. This allows the structure to exhibit plasmonic properties while having a versatile spectral tuning of its Fano response. We analyze the Fano response from the point of view of the individual subsystem as well as the coupling of supermodes of the structure. The coupling between the sustained non-orthogonal eigenmodes can be traced as a result of these modes sharing the same multipolar moments. With this, we provide insight into designing a hybrid structure with tunable Fano properties. (C) 2021 Optical Society of America

Automated summary

This paper discusses the Fano response of a hybrid trimer composed of gold and silicon nanospheres, analyzing its plasmonic properties and spectral tuning. The Fano response is analyzed from the point of view of individual subsystems and the coupling of supermodes of the structure. Insight is provided into designing a hybrid structure with tunable Fano properties by tracing the coupling between sustained non-orthogonal eigenmodes due to sharing the same multipolar moments.