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Understanding and visualizing the energy states of electrons in a crystal provides important insights into many modern electronic materials, such as superconductors, or other materials that physicists can use to develop novel electronic applications. The electronic states at the surface of a crystal, or the two-dimensional layers within a sample, are of particular interest to materials scientists, but are notoriously difficult to image using conventional techniques.

(PhysOrg.com) -- An international team of scientists successfully concentrated the energy of infrared laser pulses using a nano funnel enabling them to generate extreme ultraviolet light pulses, which repeated 75 million times per second.