Engineering preferentially-aligned nitrogen-vacancy centre ensembles in CVD grown diamond

被引：58

作者：

Osterkamp, Christian ^{[1
,2
,3
]}

Mangold, Martin ^{[1
,2
]}

Lang, Johannes ^{[1
,2
]}

Balasubramanian, Priyadharshini ^{[1
,2
]}

Teraji, Tokuyuki ^{[4
]}

Naydenov, Boris ^{[1
,2
,5
]}

Jelezko, Fedor ^{[1
,2
]}

机构：

[1] Ulm Univ, Inst Quantum Opt, Albert Einstein Allee 11, D-89081 Ulm, Germany

[2] Ulm Univ, Ctr Integrated Quantum Sci & Technol IQST, Albert Einstein Allee 11, D-89081 Ulm, Germany

[3] Ulm Univ, Inst Electron Devices & Circuits, Albert Einstein Allee 45, D-89081 Ulm, Germany

[4] Natl Inst Mat Sci, Res Ctr Funct Mat, Wide Bandgap Mat Grp, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[5] Helmholtz Zentrum Berlin Mat & Energie HZB, Kekulestr 5, D-12489 Berlin, Germany

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

HYDROGEN-RELATED DEFECTS; SPIN;

D O I：

10.1038/s41598-019-42314-7

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Here we report a method for improving the magnetic field sensitivity of an ensemble of Nitrogen-Vacancy (NV) centres in C-12-enriched diamond aligned along the [111] crystal axis. The preferentially-aligned NV centres are fabricated by a Plasma Enhanced Chemical Vapour Deposition (PECVD) process and their concentration is quantitatively determined by analysing the confocal microscopy images. We further observe that annealing the samples at high temperature (1500 degrees C) in vacuum leads to a conversion of substitutional nitrogen into NV centres. This treatment also increases the coherence time of the NV centres electron spins up to 40 mu s, which corresponds to enhancement of the sensitivity by a factor of three. However, this procedure also leads to a loss of the preferential alignment by 34%.

引用

页数：7

共 33 条

[21] Enhanced generation of single optically active spins in diamond by ion implantation [J].