Analysis and Comparison of Simulation Techniques for Silver Superlenses

210-213Transfer-matrix and finite element modelling techniques were used to simulate single- and multi-layer silver-based superlenses. The techniques were compared for their abilities to simulate sub-diffraction-limited resolution and DC transmission. The finite element modelling technique confirmed conclusions drawn from T-matrix analysis, namely that multi-layer superlenses had greater transmission over a larger window of spatial frequencies than single-layer superlenses and that superlens performance was adversely affected by resonances at different frequencies. The failure of the T-matrix technique to model interactions between the mask and lens was identified as one of the main sources of inaccuracy; however, the technique remained valuable due to its superior computational efficiency compared to finite element modelling

Meteoroids as One of the Sources for Exosphere Formation on Airless Bodies in the Inner Solar System

AbstractThis manuscript represents a review on progress made over the past decade concerning our understanding of meteoroid bombardment on airless solar system bodies as one of the sources of the formation of their exospheres. Specifically, observations at Mercury by MESSENGER and at the Moon by LADEE, together with progress made in dynamical models of the meteoroid environment in the inner solar system, offer new tools to explore in detail the physical phenomena involved in this complex relationship. This progress is timely given the expected results during the next decade that will be provided by new missions such as DESTINY+, BepiColombo, the Artemis program or the Lunar Gateway