Heliometric stereo: a new frontier in surface profilometry
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909659505360896 |
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| author | Radic, Aleksandar Lambrick, Sam Zhao, Chenyang von Jeinsen, Nick Jardine, Andrew Ward, David Dastoor, Paul |
| author_facet | Radic, Aleksandar Lambrick, Sam Zhao, Chenyang von Jeinsen, Nick Jardine, Andrew Ward, David Dastoor, Paul |
| contents | Accurate and reliable measurements of three-dimensional surface structures are important for a broad range of technological and research applications, including materials science, nanotechnology, and biomedical research. Scanning helium microscopy (SHeM) uses low-energy (64 meV) neutral helium atoms as the imaging probe particles, providing a highly sensitive and delicate approach to measuring surface topography. To date, topographic SHeM measurements have been largely qualitative, but with the advent of the heliometric stereo method - a technique that combines multiple images to create a 3D representation of a surface - quantitative maps of surface topography may now be acquired with SHeM. Here, we present and discuss two different implementations of heliometric stereo on two separate instruments, a single detector SHeM and a multiple-detector SHeM. Both implementations show good accuracy (5% and 10% respectively) for recovering the shape of a surface. Additionally, we discuss where heliometric stereo is most applicable, identify contrast features that can limit its accuracy, and discuss how to mitigate these limitations with careful design and sample choices that be readily implemented on current instruments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14833 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Heliometric stereo: a new frontier in surface profilometry Radic, Aleksandar Lambrick, Sam Zhao, Chenyang von Jeinsen, Nick Jardine, Andrew Ward, David Dastoor, Paul Instrumentation and Detectors Applied Physics Accurate and reliable measurements of three-dimensional surface structures are important for a broad range of technological and research applications, including materials science, nanotechnology, and biomedical research. Scanning helium microscopy (SHeM) uses low-energy (64 meV) neutral helium atoms as the imaging probe particles, providing a highly sensitive and delicate approach to measuring surface topography. To date, topographic SHeM measurements have been largely qualitative, but with the advent of the heliometric stereo method - a technique that combines multiple images to create a 3D representation of a surface - quantitative maps of surface topography may now be acquired with SHeM. Here, we present and discuss two different implementations of heliometric stereo on two separate instruments, a single detector SHeM and a multiple-detector SHeM. Both implementations show good accuracy (5% and 10% respectively) for recovering the shape of a surface. Additionally, we discuss where heliometric stereo is most applicable, identify contrast features that can limit its accuracy, and discuss how to mitigate these limitations with careful design and sample choices that be readily implemented on current instruments. |
| title | Heliometric stereo: a new frontier in surface profilometry |
| topic | Instrumentation and Detectors Applied Physics |
| url | https://arxiv.org/abs/2501.14833 |