Optical and Spin Coherence Properties of Nitrogen-Vacancy Centers Placed in a 100 nm Thick Isotopically Purified Diamond Layer
Optical and Spin Coherence Properties of Nitrogen-Vacancy Centers Placed in a 100 nm Thick Isotopically Purified Diamond Layer
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DOI：
10.1021/nl300350r
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发表时间：
2012-04-01
期刊：
影响因子：
10.8
通讯作者：
Itoh, Kohei M.
中科院分区：
文献类型：
--
作者：
Ishikawa, Toyofumi;Fu, Kai-Mei C.;Itoh, Kohei M.
我们研究了同位素纯C-12单晶金刚石层在化学气相生长过程中近表面氮空位(NV)中心的光学和自旋性质。NV中心的零声子发光的光谱扩散极限线宽为1.2+/-0.5 GHz，比离子注入和退火法形成的NV中心的谱线宽有很大的改善。即使对于位于表面100 nm以内的NV中心，由于C-13核自旋减少而导致的增强的自旋退相时间(T-2*接近90亩S，T-2接近1.7ms)仍然存在。
We have studied optical and spin properties of near-surface nitrogen-vacancy (NV) centers incorporated during chemical vapor phase growth of isotopically purified C-12 single-crystal diamond layers. The spectral diffusion-limited line width of zero-phonon luminescence from the NV centers is 1.2 +/- 0.5 GHz, a considerable improvement over that of NV centers formed by ion implantation and annealing. Enhanced spin dephasing times (T-2* approximate to 90 mu s, T-2 approximate to 1.7 ms) due to the reduction of C-13 nuclear spins persist even for NV centers placed within 100 nm of the surface.