Optical Response to Submicron Digital Elements Simulated by FDTD Wavelets with Refractive Impulse

Figure 1

Near field electromagnetic propagation of a vertically polarized plane wave through a section of a simple transmissive glass grating. The wavelength is 850 nm and the element width is 500 nm. The voxel is cubic with edge length 25 nm and Maxwell’s equations are continuous at all voxel boundaries. Amplitudes are selected on a plane with zero mean (dashed line). They are converted to a phase shift distribution that advances Huygens wavelets interfering at length in far field.