This article summarizes the findings of a study on resonant scattering from single silicon nanopillars on a native substrate in the visible and near infrared spectral ranges. The study utilizes numerical simulation finite-difference time- domain method to investigate the effects of lateral and vertical dimensions of the pillars on their scattering behavior. The results show that manipulating the dimensions can shift resonance modes and enhance scattering intensity. Various pillars design variations are explored, including different lengths and radii, with the aim of optimizing scattering intensity for up-conversion devices.