Strong-field Photoemission from Nanostructures

The research group ''Nano-Optics and Ultrafast Dynamics'' utilizes metallic nanostructures to localize and enhance nonlinear optical processes, such as multiphoton photoemission, in which several photons result in the release of one electron from a metallic surface. Recently, the group of Prof. Dr. Claus Ropers overcame the physical limitations of multiphoton photoemission in nanostructures, and has investigated the so-called “optical field emission” effect. The work was published in Physical Review Letters.




Schematic illustration of multiphoton photoemission from a nanoscopic gold tip (blue cone). At the transition to optical field emission, the solid angle of emission is reduced (red cone).


Article in Physical Review Letters

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