Three-dimensional mapping of surface structures is important in a wide range of biological, technological, healthcare and research applications, including taxonomy, microfluidics and fabrication. Neutral helium atom beams have been established as a sensitive probe of topography and have already enabled structural information to be obtained from delicate samples, where conventional probes would cause damage. Here, we demonstrate empirical reconstruction of a complete surface profile using measurements from a scanning helium microscope (SHeM), using the heliometric stereo method and a single detector instrument geometry. Results for the surface profile of tetrahedral aluminum potassium sulphate crystals demonstrate the areas of surfaces and facet orientations can be recovered to within 5% of the expected values.
@article{arxiv.2312.11114,
title = {3D surface profilometry using neutral helium atoms},
author = {Aleksandar Radic and Sam M. Lambrick and Nick A. von Jeinsen and Andrew P. Jardine and David J. Ward},
journal= {arXiv preprint arXiv:2312.11114},
year = {2024}
}
Comments
7 pages (including bibliography), 5 figures (including Appendix). Published at Applied Physics Letters on 14th May 2024 (doi.org/10.1063/5.0206374)