Focusing and imaging properties of a dense Gaussian apodized photon sieve

Imaging and focusing properties of a dense Gaussian-based photon sieve were examined, in detail. This special distribution causes overlapping among pinholes of photon sieve in a few innermost zones so some of the zones are being fully cleared. However, from the focusing property point of view, the central spot size is reduced as well as the transmission of photon sieve is increased, accordingly visibility is enhanced. Theoretical and simulation works clarify that an increase in the number of the cleared zones not only improves the transmission but also causes the main lobe to become narrower at the expense of increasing of sidelobes intensity. Examination of imaging behavior of dense Gaussian photon sieve also proved that there is an optimized number of clear zone for which visibility is enhanced.