Soft x-ray microscopy with 7 nm resolution

Roesner, Benedikt and Finizio, Simone and Koch, Frieder and Doring, Florian and Guzenko, Vitaliy A. and Langer, Manuel and Kirk, Eugenie and Watts, Benjamin and Meyer, Markus and Ornelas, Joshua Lorona and Spaeth, Andreas and Stanescu, Stefan and Swaraj, Sufal and Belkhou, Rachid and Ishikawa, Takashi and Keller, Thomas F. and Gross, Boris and Poggio, Martino and Fink, Rainer H. and Raabe, Joerg and Kleibert, Armin and David, Christian. (2020) Soft x-ray microscopy with 7 nm resolution. Optica, 7 (11). pp. 1602-1608.

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Official URL: https://edoc.unibas.ch/79828/

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The availability of intense soft x-ray beams with tunable energy and polarization has pushed the development of highly sensitive, element-specific, and noninvasive microscopy techniques to investigate condensed matter with high spatial and temporal resolution. The short wavelengths of soft x-rays promise to reach spatial resolutions in the deep single-digit nanometer regime, providing unprecedented access to magnetic phenomena at fundamental length scales. Despite considerable efforts in soft x-ray microscopy techniques, a two-dimensional resolution of 10 nm has not yet been surpassed in direct imaging. Here, we report on a significant step beyond this long-standing limit by combining newly developed soft x-ray Fresnel zone plate lenses with advanced precision in scanning control and careful optical design. With this approach, we achieve an image resolution of 7 nm. By combining this highly precise microscopy technique with the x-ray magnetic circular dichroism effect, we reveal dimensionality effects in an ensemble of interacting magnetic nanoparticles. Such effects are topical in current nanomagnetism research and highlight the opportunities of high-resolution soft x-ray microscopy in magnetism research and beyond. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Gross, Boris André and Poggio, Martino
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Optical Society of America
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:29 Apr 2021 12:44
Deposited On:29 Apr 2021 12:44

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