Real time phase imaging with an asymmetric transfer function metasurface
| Autor: | Wesemann, Lukas, Rickett, Jon, Davis, Timothy J., Roberts, Ann |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | ACS Photonics 9 2022 1803-1807 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/acsphotonics.2c00346 |
| Popis: | The conversion of phase variations in an optical wavefield into intensity information is of fundamental importance for optical imaging technology including microscopy of biological cells. While conventional approaches to phase-imaging commonly rely on bulky optical components or computational post processing, meta-optical devices have recently demonstrated all-optical, ultracompact image processing methods. Here we describe a metasurface that exploits photonic spin-orbit coupling to create an asymmetric optical transfer function for real time phase-imaging. The effect of the asymmetry on transmission through the device is demonstrated experimentally with the generation of high contrast pseudo-3D intensity images of phase variations in an optical wavefield without the need for post-processing. This non-interferometric method has potential applications in biological live cell imaging and real-time wavefront sensing. Comment: manuscript 11 pages, supplement 7 pages |
| Databáze: | arXiv |
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