Tuning multiple Fano and plasmon resonances in rectangle grid quasi-3D plasmonic-photonic nanostructures

Abstract

Plasmonic and photonic nanostructures can manipulate light-matter interaction, leading to a wide range of tunable properties. Here, we show that multiple Fano and plasmon resonances can be generated in quasi-3D plasmonic nanostructure arrays on rectangle grid photonic nanostructure substrates. The Fano resonances are the quasiguided modes coupled with the plasmon resonance while the distinct plasmon resonances are the localized surface plasmon resonances of the top gold thin film with sub-wavelength nanohole array and the bottom gold nanodisk array. The Fano and plasmon resonances can be tuned separately and selectively by changing the dimension of photonic and plasmonic nanostructures.