@inproceedings{e11af2aeaba547318447622b701d56d8,
title = "Black Silicon BRDF and Polarization for Coronagraphic Pupil Masks",
abstract = "Future space observatories will likely have segmented primaries, causing diffraction effects that reduce coronagraph performance. Reflective binary pupil apodizer masks can mitigate these, with the metamaterial black silicon (BSi) showing promise as a strong absorber. To bring contrast ratios to the 10−10 level as needed to observe Earth-like exoplanets, feature sizes on these BSi masks will need to be less than 5 microns when paired with MEMS (micro-electromechanical systems) deformable mirrors. As scalar diffraction cannot reliably model this feature size, we developed a Finite-Difference Time-Domain (FDTD) model of BSi masks using Meep software. We characterize the FDTD-derived polarization-dependent bidirectional reflectance distribution function of BSi and discuss the model{\textquoteright}s shortcomings.",
keywords = "Black silicon, coronagraph, FDTD, pupil mask",
author = "Jenkins, {Emory L.} and Anche, {Ramya M.} and {Van Gorkom}, {Kyle J.} and Riggs, {A. J.Eldorado} and Douglas, {Ewan S.}",
note = "Publisher Copyright: {\textcopyright} 2024 SPIE.; Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave ; Conference date: 16-06-2024 Through 22-06-2024",
year = "2024",
doi = "10.1117/12.3019380",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Coyle, {Laura E.} and Shuji Matsuura and Perrin, {Marshall D.}",
booktitle = "Space Telescopes and Instrumentation 2024",
}