Ultrafast terahertz field emission from a copper nanotip saturates at high field; the authors attribute it to surface valence electron depletion plus diffusion-limited electron replenishment from the bulk.
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Observation and Interpretation of Field Emission Saturation Induced by an Ultra-fast Intense Terahertz Field
Ultrafast terahertz field emission from a copper nanotip saturates at high field; the authors attribute it to surface valence electron depletion plus diffusion-limited electron replenishment from the bulk.