US Patent Issued to HAMAMATSU PHOTONICS on Aug. 26 for "Metasurface element, electron tube, and method for producing electron tube" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,400,821, issued on Aug. 26, was assigned to HAMAMATSU PHOTONICS K.K. (Hamamatsu, Japan).

"Metasurface element, electron tube, and method for producing electron tube" was invented by Naoya Kawai (Hamamatsu, Japan), Hideaki Yoshiara (Hamamatsu, Japan), Yuya Suzuki (Hamamatsu, Japan) and Genki Nakagomi (Hamamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A metasurface element includes a support body and a metasurface formed on a surface of the support body. The metasurface includes a metal pattern that is disposed to emit an electron in response to incidence of an electromagnetic wave, and a metal layer that contains an alkali metal and is form...