Patents by Inventor Jun-ichi Kashiwagi

Jun-ichi Kashiwagi 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).

  • Two-dimensional photonic crystal surface emitting laser
    Patent number: 7639720
    Abstract: The two-dimensional photonic crystal surface emitting laser according to the present invention includes a semiconductor substrate, a main laser section and a reflection film. The main laser section includes a lower cladding layer, an active layer, a two-dimensional photonic crystal layer, an upper cladding layer and a contact layer, which are all deposited on the semiconductor substrate. The reflection film, which surrounds the entire side surfaces of the main laser section, is made of a thin titanium-gold film deposited by sputtering.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: December 29, 2009
    Assignees: Kyoto University, Rohm Co. Ltd.
    Inventors: Susumu Noda, Jun-ichi Kashiwagi, Dai Ohnishi, Wataru Kunishi
  • Two-dimensional photonic crystal surface-emitting laser
    Publication number: 20080240193
    Abstract: The two-dimensional photonic crystal surface emitting laser according to the present invention includes a semiconductor substrate, a main laser section and a reflection film. The main laser section includes a lower cladding layer, an active layer, a two-dimensional photonic crystal layer, an upper cladding layer and a contact layer, which are all deposited on the semiconductor substrate. The reflection film, which surrounds the entire side surfaces of the main laser section, is made of a thin titanium-gold film deposited by sputtering.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 2, 2008
    Applicants: KYOTO UNIVERSITY, ROHM CO., LTD.
    Inventors: Susumu Noda, Jun-ichi Kashiwagi, Dai Ohnishi, Wataru Kunishi