Near-field Gaussian lens originating from nonlinear multilayer structures: application in "dynamic readout of super-resolution pit arrays on the discs".

The super-resolution of the nonlinear multilayer structure is analyzed, and the results indicate that the super-resolution stems from the internal multi-interference. For the nonlinear Si-based thin film, the reflected spot size can be reduced to 0.5 times that of the original spot, and the super-resolution pit arrays on the discs are dynamically read out experimentally.