Patents by Inventor Takashi Isoshima

Takashi Isoshima 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).

  • Emission wavelength-programmable organic distributed feedback laser
    Patent number: 7421003
    Abstract: An organic distributed feedback layer, which comprises a resonator in a double layer structure comprising a photo-induced mass transfer material layer and an organic fluorescence layer, provided as an under layer below the former layer, where the photo-induced mass transfer material is a polymer material having an azobenzene skeleton represented by the following chemical structure: has such a characteristic that the laser emission wavelength is programmable by changing interference exposure conditions for forming gratings of the photo-induced mass transfer material.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: September 2, 2008
    Assignee: Riken
    Inventors: Takashi Ubukata, Takashi Isoshima
  • Photoelectric conversion device and solar cell comprising same
    Publication number: 20050109390
    Abstract: Disclosed is a high-efficiency photoelectric conversion device which comprises a photonic crystal consisting essentially of a photoelectric conversion substance, and a light-emitting dye contained inside the photonic crystal, and in which the photonic crystal has a periodic structure that retards the light emission by the light-emitting dye.
    Type: Application
    Filed: August 27, 2004
    Publication date: May 26, 2005
    Applicant: RIKEN
    Inventors: Masatsugu Shimomura, Sachiko Matsushita, Nobuko Fukuda, Takashi Isoshima, Masahiko Hara
  • Emission wavelength-programmable organic distributed feedback laser
    Publication number: 20050111513
    Abstract: An organic distributed feedback layer, which comprises a resonator in a double layer structure comprising a photo-induced mass transfer material layer and an organic fluorescence layer, provided as an under layer below the former layer, where the photo-induced mass transfer material is a polymer material having an azobenzene skeleton represented by the following chemical structure: , has such a characteristic that the laser emission wavelength is programmable by changing interference exposure conditions for forming gratings of the photo-induced mass transfer material.
    Type: Application
    Filed: September 30, 2004
    Publication date: May 26, 2005
    Applicant: RIKEN
    Inventors: Takashi Ubukata, Takashi Isoshima