Periodic arrays of dielectric nanoholes have received much attention due to their high ability to control the interaction of plasmonic modes. This research studies the arrangement and composition of plasmonic two-dimensional periodic arrays of cylindrical nanoholes made of air in the Al metal layer. We investigate the plasmonic modes of this nanostructure using the time domain finite difference numerical method under normal s-polarized radiation in the range of 300-750 nm. In this work, we try to create strong surface lattice plasmon modes in the attenuated total reflection spectrum in the visible region by using appropriate dimensions of nanoholes. By changing the period and radius of the nanoholes in the periodic period of 300 nm and the radius of 80 nm in the wavelength of 477 nm, the highest amount of absorption is created near the diffraction modes of the dielectric substrate. The plasmonic mode allows us to obtain strong alternating fields. In this regard, by changing the refractive index of nanoholes and the surrounding environment, we observe noticeable changes in the position and intensity of the modes by changing to higher wavelengths. The sensitivity of the mode is equal to 41 nm/RIU. Therefore, the results of this research can show the designed nanostructure as a suitable option for use in refractive index sensors.