Photofield electron emission from an optical fiber nanotip

@article{Keramati2020PhotofieldEE,
  title={Photofield electron emission from an optical fiber nanotip},
  author={Sam Keramati and Ali Passian and Vineet Khullar and Herman Batelaan},
  journal={arXiv: Applied Physics},
  year={2020}
}
We demonstrate a nanotip electron source based on a graded index multimode silica optical fiber, tapered at one end to a radius of curvature r ~ 50 nm and coated with a thin film of gold. We report observation of laser-induced electron photoemission at tip bias potentials below the onset of dark field emission (FE). Single-photon photofield emission (PFE) is identified as the emission mechanism, which exhibits fast switching times with an upper limit on the order of 1 {\mu}s. The explored fiber… 

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References

SHOWING 1-10 OF 18 REFERENCES
Strong-field nano-optics
Surface plasmon enhanced fast electron emission from metallised fibre optic nanotips
Physical mechanisms of electron emission from fibre optic nanotips, namely, tunnelling, multi-photon, and thermionic emission, either prevent fast switching or require intense laser fields.
Optical fiber-driven low energy electron gun for ultrafast streak diffraction
Here, we present an optical fiber-based electron gun designed for the ultrafast streaking of low-energy electron bunches. The temporal profile of the few tens of the picosecond long electron bunch
Attosecond physics phenomena at nanometric tips
Attosecond science is based on electron dynamics driven by a strong optical electric fi eld and has evolved beyond its original scope in gas-phase atomic and molecular physics to solid-state targets.
Photoinduced effects in field electron emission from diamond needles
We report an explicit experimental observation of photostimulated electron field emission from diamond. The electron emission properties of monocrystalline diamond needles were investigated in the
General formulation of thermal, field, and photoinduced electron emission
The canonical equations of electron emission are the Richardson-Laue-Dushman equation for thermionic emission, the Fowler-Nordheim equation for field emission, and the Fowler-Dubridge equation for
Continuous-wave multiphoton photoemission from plasmonic nanostars
Highly nonlinear optical processes require high intensities, typically achieved with ultrashort laser pulses, and hence, they were first observed with the advent of picosecond laser technology. An
Ultrafast Field‐Emission Electron Sources Based on Nanomaterials
TLDR
The current state-of-the-art in ultrafast field-emission, particularly sub-optical-cycle field emission, based on various nanostructures (e.g., metallic nanotips, carbon nanotubes) is reviewed and a number of promising nanomaterials and possible future research directions are established.
Electron Ghost Imaging.
TLDR
A compressed sensing framework is used to improve the reconstruction quality and reduce the number of shots compared to raster scanning a small beam across the target to reduce both acquisition time and sample damage in experiments for which spatially resolved detectors are unavailable.
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