Light emitting element comprising diamond and method for producing the same
AssigneeSumitomo Electric Industries, Ltd.
InventorsShyuichi Satoh, Kazuwo Tsuji
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Abstract
A light emitting element comprising diamond which contains N-V color centers in a maximum optical density of of 0.01 to 3.5 in a direction of excitation light, Ib type nitrogen atoms in a maximum optical density not larger than 0.2 in a wavelength range of 530 to 610 nm and optionally H3 color centers, which element can be efficiently produced from artificial diamond by a combination of irradiation by an electron beam or a neutron beam and annealing.
Claims13
A light emitting element comprising synthetic diamond wherein a maximum optical density of N-V color centers in a direction of excitation light is in a range of 0.01 to 3.5, a maximum optical density of Ib type nitrogen atoms in a wavelength range of 530 to 610 nm is not greater than 0.2 and in a concentration of 1.times.10.sup.17 to 10.sup.19 atoms/cm.sup.3.
A method for producing a light emitting element comprising diamond having N-V color centers, which comprises irradiating artificial diamond containing nitrogen atoms in a concentration of 1.times.10.sup.17 to 1.times.10.sup.19 atoms/cm.sup.3 by an electron beam or a neutron beam and annealing the irradiated diamond at a temperature of 500.degree. to 1,500.degree. C. under pressure of not higher than 1 Torr.
A method for producing a light emitting element comprising diamond having N-V color centers and H3 color centers which comprises pre-irradiating artifical diamond containing nitrogen atoms in a concentration of 5.times.10.sup.17 to 2.times.10.sup.20 atoms/cm.sup.3 by an electron beam for a dosage of 10.sup.17 to 1.times.10.sup.18 electrons/cm.sup.2, annealing the pre-irradiated diamond at a temperature of not lower than 1,700.degree. C. under pressure of not lower than 3.0 GPa, irradiating the pre-irradiated and annealed diamond by an electron beam or a neutron beam and annealing the irradiated diamond at a temperature of 500.degree. to 1,500.degree. C. under pressure of not higher than 1 Torr.
Dependencies are inferred from the claim text.