The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
Sep. 28, 2021
Applicant:
Hamamatsu Photonics K.k., Hamamatsu, JP;
Inventors:
Naoya Kawai, Hamamatsu, JP;
Hideaki Yoshiara, Hamamatsu, JP;
Yuya Suzuki, Hamamatsu, JP;
Genki Nakagomi, Hamamatsu, JP;
Assignee:
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/32 (2006.01); H01J 1/34 (2006.01); H01J 43/02 (2006.01); H01J 43/28 (2006.01);
U.S. Cl.
CPC ...
H01J 1/32 (2013.01); H01J 43/02 (2013.01); H01J 43/28 (2013.01);
Abstract
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 formed on the metal pattern. The metal layer extends beyond the metal pattern to reach a region on the surface of the support body, the region being not formed with the metal pattern.