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通过电子注入的方法制备了含氮空位色心单光子源的金刚石荧光纳米颗粒.自旋回声测试结果表明,纳米颗粒中氮空位色心的相干时间T2很短,介于0.86μs至5.6μs之间.Ramsey干涉条纹测试结果表明,氮空位色心NV1点的退相干时间T2最大,为0.7μs,其电子自旋共振谱可分辨的最小线宽为1.05MHz.并且NV1点的电子自旋共振谱可分辨氮空位色心本身的14N核自旋与氮空位色心电子自旋之间的2.2MHz超精细相互作用,这对于在金刚石纳米颗粒中实现核自旋的操控和多个量子比特的门操作具有重要意义.
The diamond fluorescent nanoparticles with nitrogen-containing vacancy single-photon source were prepared by electron injection.The results of spin echo showed that the coherent time T2 of the nitrogen vacancy chromophores in the nanoparticles is very short, ranging from 0.86μs to 5.6μs Ramsey interference fringes test results show that the NV2 point of the nitrogen vacancy chrominance center has a maximum de -phasing time of 0.7 μs and a minimum resolvable line width of 1.05 MHz for the electron spin resonance spectrum, and the electron spin resonance Spectra distinguish the 2.2 MHz hyperfine interaction between the 14N nuclear spins of the nitrogen vacancy chromophore itself and the nitrogen spin-index electron spin, which is important for the control of nuclear spins and multiple quantum bits in diamond nanoparticles Door operation is of great importance.