Fig. 2
From: Influence of the Substrate to the LSP Coupling Wavelength and Strength
a Scattering peak wavelengths of different structures with varying substrate refractive indices. The insert shows the relationship between the LSP coupling wavelength and refractive index of surrounding medium based on Mie theory. b–d Polarization electric field distributions of structure A to C with n2 = 1.5 at the corresponding LSP coupling wavelength respectively