摘要
With theoretical analyses and numerical calculations, we show that a passive scatterer at the sub-wavelength scale can simultaneously exhibit both nearly zero forward scattering (NZFS) and nearly zero backward scattering (NZBS). It is related to the interference of dipolar quadrupole modes of different origin, leading to coexistence of Kerker’s first and second conditions at the same time. For optical frequencies, we propose two different sets of composited materials in multi-layered nano-structures, i.e., CdTe/Si/TiO 2 and TiO 2 /Au/Si, for the experimental realization.