Scheme configuration of NSSL.
The scheme configuration being simulated: (a) The silver slab is in contact with the PSs. (b) The silver slab is not in contact with the PSs and placed on the focal plane.
Simulation results: (a) The energy field on the PR surface and (b) energy distribution of the spot.
Frequency spectra on the two surfaces of the silver slab: (a) the frequency spectra in the case of silver being in contact with the PSs and (b) the frequency spectra in the case of silver not being in contact with the PSs.
The optimisation parameters. The solid line shows the relation between the diameter of the PS and the highest resolution. The dashed line shows the resolution for different PSs with the optimal Ag film thickness.
Nano holes with feature size of 75 nm.
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