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金刚石纳米颗粒中氮空位色心的电子自旋研究
引用本文:刘东奇,常彦春,刘刚钦,潘新宇. 金刚石纳米颗粒中氮空位色心的电子自旋研究[J]. 物理学报, 2013, 62(16): 164208-164208. DOI: 10.7498/aps.62.164208
作者姓名:刘东奇  常彦春  刘刚钦  潘新宇
作者单位:中国科学院物理研究所, 北京 100190
基金项目:国家重点基础研究发展计划,国家自然科学基金(批准号:10974251)资助的课题.*Project supported by the National Basic Research Program of China,the National Natural Science Foundation of China
摘    要: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0.86 μs至5.6 μs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0.7 μs, 其电子自旋共振谱可分辨的最小线宽为1.05 MHz. 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2.2 MHz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.关键词:纳米颗粒氮空位色心电子自旋

关 键 词:纳米颗粒  氮空位色心  电子自旋
收稿时间:2013-04-16

Electron spin studies of nitrogen vacancy centers in nanodiamonds*
Liu Dong-Qi , Chang Yan-Chun , Liu Gang-Qin , Pan Xin-Yu. Electron spin studies of nitrogen vacancy centers in nanodiamonds*[J]. Acta Physica Sinica, 2013, 62(16): 164208-164208. DOI: 10.7498/aps.62.164208
Authors:Liu Dong-Qi    Chang Yan-Chun    Liu Gang-Qin    Pan Xin-Yu
Abstract:Fluorescent nanodiamonds containing nitrogen vacancy centers are created by electron irradiation. The values of spin echo coherence time T2 of nitrogen vacancy centers in nanodiamonds are very small, which are between 0.86 μs and 5.6 μs. The results of Ramsey interference fringes show that the values of dephasing time T2* differ from each other and the T2* of nitrogen vacancy center NV1 is biggest (0.7 μs). Its inhomogeneous linewidth obtained from Fourier transform frequency spectrum of Ramsey interference fringes is 1.05 MHz. The hyperfine structure for the nitrogen vacancy center electron spin coupled to the host nitrogen-14 nuclear spin can be detected by the electron spin resonance spectrum in nitrogen vacancy center NV1. It is important for the realization of the manipulation of nuclear spins and quantum gates of multiqubit in nanodiamonds.
Keywords:nanodiamondnitrogen vacancy centerelectron spin
Keywords:nanodiamond  nitrogen vacancy center  electron spin
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