Photo-cathode for a vacuum system
AssigneeHamamatsu Photonics K.K.
InventorsPeter Uhd Jepsen, Simon Lehnskov Lange, Motohiro Suyama, Masahiko Iguchi
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Abstract
This invention concerns a photo-cathode for a vacuum system, wherein the photo-cathode is configured for receiving electromagnetic radiation having an incoming wavelength and for emitting electrons in response thereto. The photo-cathode comprises a conducting structure having a geometry, the geometry comprising a tip section. The tip section is adapted to provide field enhancement, β, when the conducting structure is illuminated with the electromagnetic radiation, wherein β is greater than about 102. The photo-cathode further comprising a substrate, the substrate being or comprising a dielectric substrate, the substrate supporting the conducting structure.
Claims18
Photo-cathode for a vacuum system, wherein the photo-cathode is configured for receiving electromagnetic radiation having an incoming wavelength and for emitting electrons in response thereto, the photo-cathode comprising:
- a conducting structure having a geometry, the geometry comprising a tip section, wherein the tip section is adapted to provide a field enhancement factor,β, greater than about 102, and
- a substrate, the substrate being or comprising a dielectric substrate, the substrate supporting the conducting structure,
- wherein the conducting structure has two dipoles separated by a gap.
Dependencies are inferred from the claim text.