The Center for X-Ray Optics new technique for creating high-resolution zone plates involves two separate patterns of alternating zones fabricated sequentially and overlaid on the same wafer.
With the new technique the zones were spaced approximately 15 nanometers apart (30 nanometers between the centers of each gold zone). Future improvements will be directed at narrower zones with no gaps and even closer spacing.
Zone Plate Lenses Capable of Better than 15-Nanometer Resolution
Progress in nanoscience and nanotechnology depends not only on examining the surfaces of things but on seeing deep inside biological organisms and material structures to identify what they’re made of — and what electronic, magnetic, optical, and chemical processes may be in play.
For measuring internal variations in shape, organization, magnetism, polarization, or chemical make-up over distances of a few nanometers (billionths of a meter), x-ray microscopy not only complements electron microscopy but also offers important advantages. The XM-1 x-ray microscope at the Advanced Light Source, located at the Department of Energy’s Lawrence Berkeley National Laboratory, uses bright beams of "soft" x-rays to produce images that not only reveal structures but can identify their chemical elements and measure their electromagnetic and other properties as well.
Paul Preuss | EurekAlert!
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