Patents by Inventor Dmitry Dmitrievich Grachev

Dmitry Dmitrievich Grachev 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).

  • Method for generating spin waves
    Patent number: 8779765
    Abstract: In the method, a pre-selected working area of a graphene film with a linear dimension of 2,000 nm, which working area is divided into sections having a dimension of 50-100 nm, is subjected to the effect of a pulsed alternating magnetic field with a frequency of 3 terahertz that corresponds to the transition from the ground energy level, corresponding to the non-excited state of spin density, to a fourth working energy level of the excited state of spin density in the graphene film, thus causing spin density pumping. A spatially localized external magnetic field is generated around the edges of the working area, which resonantly reflects spinons having a working frequency of 0.5-1 terahertz that corresponds to the transition from a third working energy level to a second working energy level of the excited state of spin density, said spinons causing the induced coherent radiation of working frequency spin waves as they pass thorough the working area.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: July 15, 2014
    Assignees: Peoples Friendship University of Russia, Federal State Budgetary Institution “Federal Agency for Legal Protection of Military, Special and Dual Use Intellectual Activity Results”
    Inventors: Dmitry Dmitrievich Grachev, Leonid Antonovich Sevastyanov
  • METHOD FOR GENERATING SPIN WAVES
    Publication number: 20130293227
    Abstract: In the method, a pre-selected working area of a graphene film with a linear dimension of 2,000 nm, which working area is divided into sections having a dimension of 50-100 nm, is subjected to the effect of a pulsed alternating magnetic field with a frequency of 3 terahertz that corresponds to the transition from the ground energy level, corresponding to the non-excited state of spin density, to a fourth working energy level of the excited state of spin density in the graphene film, thus causing spin density pumping. A spatially localized external magnetic field is generated around the edges of the working area, which resonantly reflects spinons having a working frequency of 0.5-1 terahertz that corresponds to the transition from a third working energy level to a second working energy level of the excited state of spin density, said spinons causing the induced coherent radiation of working frequency spin waves as they pass thorough the working area.
    Type: Application
    Filed: December 19, 2011
    Publication date: November 7, 2013
    Applicant: PEOPLES FRIENDSHIP UNIVERSITY OF RUSSIA
    Inventors: Dmitry Dmitrievich Grachev, Leonid Antonovich Sevastyanov