Hyperspectral compressive wavefront sensing

Howard, Sunny; Esslinger, Jannik; Wang, Robin H.W.; Norreys, P.; Döpp, A.

doi:10.1017/hpl.2022.35

Cited by 15 publications

(3 citation statements)

References 33 publications

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“…( 1), which corresponds to the convergence condition. Once the image distribution is obtained, the test object can be directly obtained from the conjugation relationship between the object and image space [34][35][36][37] .…”

Section: Array Focusing and Phase-shift Imagingmentioning

confidence: 99%

Free light-shape focusing in extreme-ultraviolet radiation with self-evolutionary photon sieves

Cui,

Zhang,

et al. 2024

Sci Rep

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Extreme-ultraviolet (EUV) radiation is a promising tool, not only for probing microscopic activities but also for processing nanoscale structures and performing high-resolution imaging. In this study, we demonstrate an innovative method to generate free light-shape focusing with self-evolutionary photon sieves under a single-shot coherent EUV laser; this includes vortex focus shaping, array focusing, and structured-light shaping. The results demonstrate that self-evolutionary photon sieves, consisting of a large number of specific pinholes fabricated on a piece of Si3N4 membrane, are capable of freely regulating an EUV light field, for which high-performance focusing elements are extremely lacking, let alone free light-shape focusing. Our proposed versatile photon sieves are a key breakthrough in focusing technology in the EUV region and pave the way for high-resolution soft X-ray microscopy, spectroscopy in materials science, shorter lithography, and attosecond metrology in next-generation synchrotron radiation and free-electron lasers.

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Section: Array Focusing and Phase-shift Imagingmentioning

confidence: 99%

Free light-shape focusing in extreme-ultraviolet radiation with self-evolutionary photon sieves

Cui,

Zhang,

et al. 2024

Sci Rep

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show abstract

“…The middle rhombus-shaped part is the stealth area, which is composed of a rhombus-shaped PEC frame with a side length of 3360 μm. To verify the stealth properties of the proposed transmissive cloak, we performed full-wave simulations using the finite integration method [74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91].…”

Section: Unit Structure Designmentioning

confidence: 99%

Broadband achromatic transmission stealth cloak based on all dielectric metasurfaces

Li,

Xu,

Liu

et al. 2024

Phys. Scr.

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The emergence of metasurface technology has brought innovation to the design of optical devices, and many optical devices based on metasurface have been proposed. However, the inherent dispersion of metasurface structures limits their ability to operate at wide frequencies. By changing the geometric parameters of the metasurface unit structure, the unit structure has achromatic properties on the basis of satisfying the phase gradient. Numerical simulation results demonstrate that the proposed multilayer transmissive metasurface stealth cloak has broadband stealth function in the frequency range of 0.7 to 0.77 THz. Achromatic broadband metasurface stealth devices provide new ideas for the design of broadband metasurface stealth devices, and also promote the research of other broadband metasurface optical devices.

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“…Measurements resemble tomographic reconstruction as they capture the beam under scrutiny at different “angles”; by combining multiple diagnostics that each provide a partial constraint, the properties of the beam can be inferred. The study by Huang et al serves as an encouraging proof-of-principle and cross-fertilization with concepts employed in computed tomography or laser diagnostics may give room for rapid future progress, e.g., by borrowing techniques from compressed sensing 17 , 18 .…”

mentioning

confidence: 99%