Modeling the diffraction efficiency of holographic microgratings

Microlocalized holographic reflection gratings enable high-density three-dimensional optical data storage. Diffraction of light by these microholograms is modeled using a far-field approximation of the volume integral, which reduces the computational effort from 3D to 1D numerical integration. With this method, the diffraction efficiency is calculated, spatially resolved in terms of the dependence on the lateral and longitudinal scan position. The impact of the numerical aperture is analyzed. The potential of wavelength multiplexing is investigated by calculating the wavelength selectivity of microholograms. (fast track communication)