| 摘要 |
<p>Within a vacuum vessel, there are arranged an electron emitting part emitting an electron beam in a first direction, and an optical amplifying part amplifying incident light with a help of energy of the electron beam. The optical amplifying part includes a flat dielectric substrate made of a quartz glass, a rectilinear dielectric optical waveguide provided on the flat dielectric substrate, made of a dielectric material having a high refractive index and extending in said first direction, input and output optical waveguides provided on the dielectric substrate and being coupled with both ends of the dielectric optical waveguide, and a pair of electron beam converging electrodes arranged on respective sides of the dielectric optical waveguide. A velocity of the incident light is delayed during the propagation through the dielectric optical waveguide, and a part of the incident light penetrates from the dielectric optical waveguide into the vacuum in the form of evanescent light. The electron beam is confined in a narrow region above the dielectric optical waveguide by means of an electric field produced by said electrodes, and the thus confined electron beam effectively interacts with an optical component of the evanescent light directing in the electron beam travelling direction to amplify the incident light. <IMAGE></p> |
