Science, Space and Technology News 2024
Scatter pattern produced by doughnut-shaped beams of light bouncing off of an object with a regularly repeating structure. Credit: Wang, et al., 2023, “Optica”patterns in tiny electronic or photonic components, a new method based on lensless imaging allows for near-perfect high-resolution microscopy. Ptychography, a powerful form of lensless imaging, uses a scanning beam to collect scattered light for image reconstruction, facing challenges with periodic samples.
The most powerful form of lensless imaging is called ptychography, which works by scanning a laser-like beam across a sample, collecting the scattered light, and then using a computer algorithm to reconstruct an image of the sample. Taking on this challenge, recently graduated Ph.D. researchers Bin Wang and Nathan Brooks, working with JILA Fellows Margaret Murnane and Henry Kapteyn, developed a novel method that uses short-wavelength light with a special vortex or donut shape to scan these repeating surfaces, resulting in more varied diffraction patterns. This allowed the researchers to capture high-fidelity image reconstructions using this new approach, which they recently published in the journal.
When the scientists illuminated their microscope with vortex-shaped HHG beams , more intricate scatter patterns were produced, which changed as the sample was scanned. These variations encoded information about the sample’s repeating motifs and enabled the algorithm to extract an accurate image.
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