Determine the lattice spacing used for the reference MEEP figures

Determine whether the figures provided on the MEEP Project 4 website were generated using a lattice spacing of a = 0.64 μm.

Background

The paper compares its independently generated simulations with figures associated with MEEP Project 4, for which previous studies identified a lattice spacing of a = 0.64 μm as producing the largest average broadband absorption. The authors report discrepancies between their reproduced figures and those displayed on the MEEP website, noting that the website documentation does not establish which lattice spacing was used. Resolving this issue is necessary for a reliable comparison between the reference circular-cone sensor and the modified geometries examined in the paper.

References

We have tried to use the original python program downloaded from MEEP project 4 but the figures thus generated, Figure \ref{compare2} (a)(b), are different from what are shown in the website. In view that we have discovered that the program or the shell script all contain minor typos and the authors have not confirmed whether the figures provided on their website are based on $a = 0.64\mu\text{m}$ we would trust our result.

— Asymmetric Textured Image Sensors Based on Antenna Theory as Designed by Nature  (2608.12729 - Ting, 13 Aug 2026) in Section Results