But the problem is that the spatial resolution of the photo/hologram is limited by the wavelength of light, around or just-below 1 ?m (0.001 mm). That's fine for macroscopic objects, but it starts to fail when entering the realm of nanotechnology.
Now researchers from Fabrizio Carbone's lab at EPFL have developed a method to see how light behaves on tiniest scale, well beyond wavelength limitations. The researchers used the most unusual photographic media: freely propagating electrons. Used in their ultrafast electron microscope, the method can encode quantum information in a holographic light pattern trapped in a nanostructure, and is based on an exotic aspect of electron and light interaction.
Scientists - Nature - Interaction - Electron-reference - Beams
The scientists used the quantum nature of the electron-light interaction to separate the electron-reference and electron-imaging beams in energy instead of space. This makes it now possible to use light pulses to encrypt information on the electron wave function, which can be mapped with ultra-fast transmission electron microscopy.
The new method can provide us with two important benefits: First, information on light itself, making it a powerful tool for imaging electromagnetic fields with...
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