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Journal Article

Femtosecond tunable-wavelength photoassisted cold field emission

MPS-Authors

Haindl,  Rudolf
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

Köster,  Kerim
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Gaida,  John H.
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

Franz,  Maximilian
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Feist,  Armin
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Ropers,  Claus       
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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s00340-023-07968-2.pdf
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Citation

Haindl, R., Köster, K., Gaida, J. H., Franz, M., Feist, A., & Ropers, C. (2023). Femtosecond tunable-wavelength photoassisted cold field emission. Applied Physics B: Lasers and Optics, 129(3): 40. doi:10.1007/s00340-023-07968-2.


Cite as: https://hdl.handle.net/21.11116/0000-000C-ADFE-4
Abstract
We demonstrate photoassisted cold field emission (PFE) from a tungsten tip induced by tunable-wavelength low-power femtosecond laser excitation. The emission current from the apex of the (310)-oriented single-crystalline emitter is shown to linearly depend on the incident laser power, while the effective work function is reduced by the respective photon energy. Our results promote the implementation of the linear regime in laser-triggered cold field emission for ultrafast transmission electron microscopy.