arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0903.3277cond-mat.mtrl-scicond-mat.mes-hallphysics.ins-detquant-ph
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用于磁力测量的高氮空位密度金刚石

High nitrogen-vacancy density diamonds for magnetometry applications

V. M. Acosta, E. Bauch, M. P. Ledbetter, C. Santori, K. -M. C. Fu, P. E. Barclay, R. G. Beausoleil, H. Linget, J. F. Roch, F. Treussart, S. Chemerisov, W. Gawlik, D. Budker

摘要:

通过辐照和不同条件下的退火,在毫米级金刚石样品中产生了氮空位(NV)中心。这些样品的光学和自旋弛豫特性,其特征在于使用共聚焦显微镜,可见光和红外吸收,和光学检测磁共振。NV-浓度最高的样品约为16 ppm = 2.8 x 10^{18} cm^{-3},制备时没有可观察到的中性电荷空位缺陷痕迹。该样品的有效横向自旋弛豫时间为T2* = 118(48)ns,主要受测定浓度为52(7)ppm的残留顺磁性氮的限制。在理想条件下,对于基于该样品的100微米尺度磁力计,散粒噪声限制灵敏度预计为~150 fT/ \sqrt{Hz}。制备并表征了NV-浓度为0.007至12 ppm且有效弛豫时间为27至291 ns的其他样品。

英文摘要:

Nitrogen-vacancy (NV) centers in millimeter-scale diamond samples were produced by irradiation and subsequent annealing under varied conditions. The optical and spin relaxation properties of these samples were characterized using confocal microscopy, visible and infrared absorption, and optically detected magnetic resonance. The sample with the highest NV- concentration, approximately 16 ppm = 2.8 x 10^{18} cm^{-3}, was prepared with no observable traces of neutrally-charged vacancy defects. The effective transverse spin relaxation time for this sample was T2* = 118(48) ns, predominately limited by residual paramagnetic nitrogen which was determined to have a concentration of 52(7) ppm. Under ideal conditions, the shot-noise limited sensitivity is projected to be ~150 fT/\sqrt{Hz} for a 100 micron-scale magnetometer based on this sample. Other samples with NV- concentrations from .007 to 12 ppm and effective relaxation times ranging from 27 to 291 ns were prepared and characterized.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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