| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a photo cathode device with high quantum efficiency, a long service life, and a low manufacturing cost. <P>SOLUTION: An ultraviolet laser beam UV into a quartz prism 1 enters an aluminum layer 2 with an incident angleθin the photo cathode device. A surface-plasmon resonant light is excited by the ultraviolet laser beam UV at the aluminum layer 2; and a photo electron is emitted from a photoelectric surface opposite to the surface of the quartz prism 1 at the aluminum layer 2, by means of the photoelectric effect of the surface-plasmon resonant light. The incident-light angleθamounts to a plasmon-dip angle with the minimal reflectance R of the ultraviolet laser beam UV at the light-incident surface of the aluminum layer 2 in a total-reflection region. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
