The AgOx-type super-resolution near-field structure (super-RENS) is one of the nano thin films that can give a nonlinear optical effect similar to that of the optical probe of the scanning near-field optical microscope. Structural variations of different thicknesses of the AgOx thin film are observed and studied using a field-emission scanning electron microscope (FE-SEM). For single AgOx nano thin film, the critical temperature and threshold of the evaporation temperature are 154 degrees and 600 degrees, respectively. Results show that the sandwiched AgOx nano thin film has a higher critical temperature, that is, about 280 degrees. For the sandwiched AgOx nano thin film, the transmittance peak is dependent on the thickness of the AgOx thin film. The interesting properties of the AgOx nano thin film of the super-resolution structure indicate a great potential for photonic applications.