Dancing Electrons (IMAGE)

Bielefeld University

Dancing Electrons

Caption

Electron (green) emitted from a tungsten atom in the second atomic layer of the semiconductor tungsten diselenide (WSe2). The electron starts its trajectory with an orbiting motion and only after some time the straight flight from the emitter atom takes over. The electron orbiting or "dancing" depends on the initial state and thus varies between tungsten and selenium atoms and different initial states. Ultrashort pulses of light were employed to time the race between different emission channels with 10-17 seconds precision.

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Photo: Bielefeld University

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