公开(公告)号：US12261010B2

公开(公告)日：2025-03-25

申请号：US17619711

申请日：2020-06-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Peter Uhd Jepsen ,  Simon Lehnskov Lange ,  Motohiro Suyama ,  Masahiko Iguchi

IPC: H01J1/34 ,  H01J31/50 ,  H01J40/06 ,  H01J43/24

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.