Experimental study of a broadband vacuum photosensor with the tunnel emission from a metal nanoscale blade

In this work, we describe the technology and design of planar multilayer structure. It is used as a sensitive element of the vacuum photosensor. Metal and dielectric layers are of nanoscale thickness. It is shown that the use of a thin molybdenum blade in the structure ensures the localization of the electrostatic field and increases the photosensitivity of the vacuum sensor. Submicron inter-electrode gaps provide a short transit time of the electron beam caused by the action of a light pulse. The ballistic transport of electrons in a vacuum is characterized by a high speed.