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- W4386392308 abstract "We present a 48-element programmable phase plate for coherent electron waves consisting of chip-based microscopic electrostatic elements. This brings the highly successful concept of wavefront shaping from light optics into the realm of electron optics and provides an important new degree of freedom to prepare the quantum state of electron waves. The phase plate is produced by a combination of photolithography and focused ion beam post-processing. It consists of an array of 48 electrostatic Einzel lenses distributed along a polar grid with 12-fold rotational symmetry. The phase plate chip is controlled by a series of 16-bit digital-to-analog converters and is mounted on an aperture rod placed in the C2 plane of a state-of-the-art transmission electron microscope operating in the 100-300 keV range. The experimental phase plate behavior is characterized by a Gerchberg-Saxton phase reconstruction algorithm, showing a phase sensitivity of 0.075 rad/mV at 300 keV, with a phase resolution of approximately 3$cdot$10$^{-3}~pi$. The performance of the phase plate is demonstrated by preparing a series of orthogonal quantum states with specific intensity profiles. We discuss a range of attractive applications in electron microscopy and show an experimental proof of concept of a self-tuning electron microscope setup, demonstrating the potential of adaptive electron optics." @default.
- W4386392308 created "2023-09-03" @default.
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- W4386392308 date "2023-08-23" @default.
- W4386392308 modified "2023-10-14" @default.
- W4386392308 title "Quantum Wavefront Shaping with a 48-element Programmable Phase Plate for Electrons" @default.
- W4386392308 doi "https://doi.org/10.48550/arxiv.2308.16304" @default.
- W4386392308 hasPublicationYear "2023" @default.
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