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AssigneePeoples Friendship University of Russia
InventorsDmitry Dmitrievich Grachev, Leonid Antonovich Sevastyanov
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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.
A method for forming spin waves in graphene films, characterized in that 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 acted on with a pulsed alternating magnetic field having 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 the fourth working energy level of the excited state of spin density in the graphene film, thus causing energy pumping of spin density, a spatially localized external magnetic field being formed at the edges of the working area, which resonantly reflects spinons having a working frequency of 0.5-1 terahertz corresponding to the transition from the third working energy level to the second working energy level of the excited state of spin density, and the said spinons, when they pass through the working area, cause induced coherent emission of working frequency spin waves.
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