Erlangen 2022 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 15: Poster 2
MO 15.24: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Non-destructive 3D imaging of encapsulated monoatomic layers using XUV coherence tomography — •Florian Funke1, Felix Wiesner1, Johann Jakob Abel1, Slawomir Skruszewicz2, Julius Reinhard3, Jan Nathanael4, Martin Wünsche3, Christian Rödel5, Silvio Fuchs1,3, and Gerhard G. Paulus1,3 — 1IOQ, FSU Jena, Germany — 2DESY, Hamburg, Germany — 3Helmholtz Institut Jena, Germany — 4IOF, Jena, Germany — 5TU Darmstadt, Germany
For many applications of 2D materials an encapsulation in bulk materials is required [1]. In order to further investigate them, it is crucial to have reliable methods for structural and functional characterization. While a variety of such methods exists only for uncovered 2D materials, there is a need for imaging techniques of encapsulated 2D materials as well as their surrounding matter.
We use non-destructive extreme-ultraviolet coherence tomography (XCT) [2,3] in order to generate 3D images of encapsulated monolayers of graphene and MoS2. XCT measures the broadband XUV reflectivity, which contains the depth profile information imprinted via spectral modulations. From these modulations the depth structure is reconstructed with a specialized phase retrieval algorithm for each illumination point. A 3D image is generated by lateral scanning of the sample.
[1] Z. Li, Nat. Com. 11, 1151 (2020)
[2] F. Wiesner, Optica 8, 230-238 (2021)
[3] S. Fuchs, Optica 4, 903-906 (2017)