Patents by Inventor Yoshimichi Katoh

Yoshimichi Katoh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photonic crystal and producing method thereof
    Patent number: 7088902
    Abstract: A photonic crystal and a producing method thereof are provided. The photonic crystal includes at least two media of different refractive indices formed on a semiconductor substrate. One of the media is periodically arranged in another one of the media. The photonic crystal has a cleaved surface on its side. The directions of primitive translation vectors representing the periodic arrangement directions of the one medium are at desired angles with the cleaved surface. Preferably, the direction of at least one of the primitive translation vectors is in parallel with the cleaved surface.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: August 8, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshimichi Katoh, Toshiyuki Okumura
  • Photonic crystal and producing method thereof
    Publication number: 20040240834
    Abstract: A photonic crystal and a producing method thereof are provided. The photonic crystal includes at least two media of different refractive indices formed on a semiconductor substrate. One of the media is periodically arranged in another one of the media. The photonic crystal has a cleaved surface on its side. The directions of primitive translation vectors representing the periodic arrangement directions of the one medium are at desired angles with the cleaved surface. Preferably, the direction of at least one of the primitive translation vectors is in parallel with the cleaved surface.
    Type: Application
    Filed: May 26, 2004
    Publication date: December 2, 2004
    Inventors: Yoshimichi Katoh, Toshiyuki Okumura