Wavelength and shape dependent strong-field photoemission from silver nanotips
2016
We study optical field emission from silver nanotips, showing the combined influence of the illumination wavelength and the exact shape of the nanotip on the strong-field response. This is particularly relevant in the case of FIB milled nano tips, where the nanotip fabrication capabilities could become a new ingredient for the study of strong-field physics. The influence of the thermal load on the nanotip and its effect on the emission is studied as well by switching the repetition rate of the laser source from 1?kHz to 62?MHz, showing a clear transition towards the quenching of the strong-field emission.
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