Disclosed is a miniature, two-dimensional, auto-cloning, polarizing beam splitter that includes a substrate and an optical multilayer. The substrate is formed with a periodic structure. The optical multilayer is formed on the periodic structure of the substrate. The optical multilayer includes a (LH)n structure wherein H represents a film of a high refractive index, and L represents a film of a low refractive index, and n is an integer. The auto-cloning polarizing beam splitter is operable to split infrared light of wavelengths of 1000 nm to 1300 nm.