Substrate and method for its manufacturing
View Patent ↗A substrate comprising diamond has NV − centers in a concentration greater than about 0.5 parts per million (ppm). The method for producing this diamond substrate includes providing diamond being doped with nitrogen, irradiating at least a partial surface of the substrate with radiation that creates vacancies in the diamond, and carrying out a second heat treatment of the substrate at a certain temperature. The substrate can be used as a sensor element of a magnetometer or also as a qubit of a quantum computer.
1 . A substrate comprising:
diamond, wherein the diamond comprises NV − color centers in a concentration of more than 0.5 parts per million (ppm), further wherein the diamond has an absorption coefficient of electromagnetic radiation in a wavelength range from 680 nanometers (nm) to 760 nm of less than 0.4 per centimeter (cm −1 ).
2 . The substrate according to claim 1 , wherein the diamond has an absorption coefficient of electromagnetic radiation in the wavelength range from 680 nm to 760 nm of less than 0.2 cm −1 .
3 . The substrate according to claim 1 , wherein the diamond of the substrate has an absorption coefficient of electromagnetic radiation in the wavelength range from 680 nm to 760 nm of more an 0.001 cm −1 .
4 . The substrate according to claim 1 , wherein the diamond comprises NV − color centers in a concentration greater than 1 ppm.
5 . The substrate according to claim 2 , wherein the diamond of the substrate has an absorption coefficient of electromagnetic radiation in a wavelength range from 1000 nm to 1100 nm of less than 0.04 cm −1 or less than 0.02 cm −1 or less than 0.01 cm −1 .
6 . The substrate according to claim 1 , wherein the diamond comprises NV − color centers in a concentration of less than 10.0 ppm.
7 . The substrate according to claim 1 , wherein the NV − color centers exhibit an ensemble contrast, as determined by optically detected magnetic resonance, of more than 6%.
8 . A substrate comprising:
diamond, wherein the diamond comprises NV − color centers in a concentration of more than 0.5 parts per million (ppm) and less than 10.0 ppm, wherein the diamond has an absorption coefficient of electromagnetic radiation in a wavelength range from 680 nanometers (nm) to 760 nm of less than 0.4 per centimeter (cm −1 ).
9 . A substrate comprising:
diamond, wherein the diamond comprises NV − color centers in a concentration of more than 0.5 parts per million (ppm) and less than 10.0 ppm, further wherein the diamond has an absorption coefficient of electromagnetic radiation in a wavelength range from 680 nanometers (nm) to 760 nm of less than 0.4 per centimeter (cm −1 ) and more than 0.001 cm −1 .