Scalable Fabrication of High Purity Diamond Nanocrystals with Long-Spin-Coherence Nitrogen Vacancy Centers

被引：82

作者：

Trusheim, Matthew E. ^{[1
]}

Li, Luozhou ^{[2
]}

Laraoui, Abdelghani ^{[3
]}

Chen, Edward H. ^{[1
]}

Bakhru, Hassaram ^{[4
]}

Schroeder, Tim ^{[1
]}

Gaathon, Ophir ^{[1
,2
]}

Meriles, Carlos A. ^{[3
]}

Englund, Dirk ^{[1
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[3] CUNY City Coll, Dept Phys, New York, NY 10031 USA

[4] SUNY Albany, Coll Nanoscale Sci & Engn, Albany, NY 12203 USA

来源：

NANO LETTERS | 2014年 / 14卷 / 01期

基金：

美国国家科学基金会;

关键词：

Nanodiamond; nitrogen vacancy; long coherence; magnetometry; reactive ion etching; NUCLEAR-MAGNETIC-RESONANCE; ELECTRONIC SPIN; FLUORESCENCE; TIME;

D O I：

10.1021/nl402799u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The combination of long spin coherence time and nanoscale size has made nitrogen vacancy (NV) centers in nanodiamonds the subject of much interest for quantum information and sensing applications. However, currently available high-pressure high-temperature (HPHT) nanodiamonds have a high concentration of paramagnetic impurities that limit their spin coherence time to the order of microseconds, less than 1% of that observed in bulk diamond. In this work, we use a porous metal mask and a reactive ion etching process to fabricate nanocrystals from high-purity chemical vapor deposition (CVD) diamond. We show that NV centers in these CVD nanodiamonds exhibit record-long spin coherence times in excess of 200 mu s, enabling magnetic field sensitivities of 290 nT Hz(-1/2) with the spatial resolution characteristic of a 50 nm diameter probe.

引用

页码：32 / 36

页数：5

共 32 条

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