High-Resolution X-Ray Lensless Imaging by Differential Holographic Encoding

Zhu, Diling; Guizar‐Sicairos, Manuel; Wu, Benny; Scherz, Andreas; Acremann, Yves; Tyliszczak, Tolek; Fischer, Peter; Friedenberger, Nina; Ollefs, Katharina; Farle, Michael; Fienup, James R.; Stöhr, J.

doi:10.1103/physrevlett.105.043901

Cited by 84 publications

(67 citation statements)

References 32 publications

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“…However, there are only a handful of special cases for which these reconstruction procedures are known. Notwithstanding the specificity of each approach, the aforementioned methods still leave something to be desired as Fresnel-zone plate references have missing information at low frequencies 13 and sharp corner references improve resolution only along a few specific directions 14 . A further limitation is that missing data have a significant impact on the results of existing FTH methods.…”

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confidence: 99%

X-ray holography with a customizable reference

et al. 2014

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In X-ray Fourier-transform holography, images are formed by exploiting the interference pattern between the X-rays scattered from the sample and a known reference wave. To date, this technique has only been possible with a limited set of special reference waves. We demonstrate X-ray Fourier-transform holography with an almost unrestricted choice for the reference wave, permitting experimental geometries to be designed according to the needs of each experiment and opening up new avenues to optimize signal-to-noise and resolution. The optimization of holographic references can aid the development of holographic techniques to meet the demands of resolution and fidelity required for single-shot imaging applications with X-ray lasers.

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confidence: 99%

X-ray holography with a customizable reference

et al. 2014

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“…With the advent of XFELs, there has been an increasing interest in coherent diffraction imaging which allows fast and reliable inversion of scattering patterns to generate real space images with nanometre resolution via Fourier transform holography or phase retrieval image reconstruction [111][112][113]. On the Nanoscience beamline (I06) Ogrin (Exeter) and co-workers have developed magnetic holography using extended reference by autocorrelation linear differential operator (HERALDO) [114]. This lensless imaging technique allows direct image reconstruction from a measurement of the Fraunhofer diffraction pattern using a sharp feature to generate the reference wave.…”

Section: Nanomagnetism (A) Domain Wall Motion In Nanowiresmentioning

confidence: 99%

The contribution of Diamond Light Source to the study of strongly correlated electron systems and complex magnetic structures

Radaelli

Dhesi

2015

Phil. Trans. R. Soc. A.

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We review some of the significant contributions to the field of strongly correlated materials and complex magnets, arising from experiments performed at the Diamond Light Source (Harwell Science and Innovation Campus, Didcot, UK) during the first few years of operation (2007–2014). We provide a comprehensive overview of Diamond research on topological insulators, multiferroics, complex oxides and magnetic nanostructures. Several experiments on ultrafast dynamics, magnetic imaging, photoemission electron microscopy, soft X-ray holography and resonant magnetic hard and soft X-ray scattering are described.

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“…Better spatial resolution can actually be achieved by using smaller reference holes with iterative phase retrieval methods 10 and/or extended references by using the HERALDO (holography with extended reference by autocorrelation linear differential operation) concept. 27 Nondestructive resonant magnetic scattering measurements using single pulses from a free electron laser source probe elementary magnetization dynamics in the femtosecond regime. 28 Future scientific tasks will be related with both temperature, current-induced, time-resolved, and single-shot experiments performed in both perpendicular and in-plane magnetic anisotropy systems.…”

Section: Conclusion and Future Trendsmentioning

confidence: 99%

Exploring the limits of soft x-ray magnetic holography: Imaging magnetization reversal of buried interfaces (invited)

Camarero¹,

Jiménez²,

Vogel³

et al. 2011

Journal of Applied Physics

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Only a very few experimental techniques can address the microscopic magnetization reversal behavior of the different magnetic layers in a multilayered system with element selectivity. We present an element-selective study of ferromagnetic (FM) [Co/Pt] n multilayers with perpendicular anisotropy exchange-coupled to antiferromagnetic (AFM) FeMn and IrMn films performed with a new experimental set-up developed for both soft x-ray spectroscopy and holography imaging purposes. The spectroscopy analysis allows the quantification of the unpinned (pinned) uncompensated AFM moments, providing direct evidence of its parallel (antiparallel) alignment with respect to the FM moments. The holography experiments give a direct view of both FM and uncompensated AFM magnetic structures, showing that they replicate to each other during magnetization reversal. Remarkably, we show magnetic images for effective thicknesses as small as one monolayer. Our results provide new microscopic insights into the exchange coupling phenomena and explore the sensitivity limits of these techniques. Future trends are also discussed.

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High-Resolution X-Ray Lensless Imaging by Differential Holographic Encoding

Cited by 84 publications

References 32 publications

X-ray holography with a customizable reference

X-ray holography with a customizable reference

The contribution of Diamond Light Source to the study of strongly correlated electron systems and complex magnetic structures

Exploring the limits of soft x-ray magnetic holography: Imaging magnetization reversal of buried interfaces (invited)

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