Efficient photon detection from color centers in a diamond optical waveguide

被引：145

作者：

Le Sage, D. ^{[1
,2
]}

Pham, L. M. ^{[3
]}

Bar-Gill, N. ^{[1
,2
]}

Belthangady, C. ^{[1
,2
]}

Lukin, M. D. ^{[2
]}

Yacoby, A. ^{[2
]}

Walsworth, R. L. ^{[1
,2
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 12期

基金：

美国国家科学基金会;

关键词：

NANOSCALE RESOLUTION; ELECTRONIC SPIN; SINGLE; MICROSCOPY;

D O I：

10.1103/PhysRevB.85.121202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A common limitation of experiments using color centers in diamond is the poor photon collection efficiency of microscope objectives due to refraction at the diamond interface. We present a simple and effective technique to detect a large fraction of photons emitted by color centers within a planar diamond sample by detecting light that is guided to the edges of the diamond via total internal reflection. We describe a prototype device using this "side-collection" technique, which provides a photon collection efficiency approximate to 47% and a photon detection efficiency approximate to 39%. We apply the enhanced signal-to-noise ratio gained from side collection to ac magnetometry using ensembles of nitrogen-vacancy (NV) color centers, and demonstrate an ac magnetic field sensitivity approximate to 100 pT/root Hz, limited by added noise in the prototype side-collection device. Technical optimization should allow significant further improvements in photon collection and detection efficiency as well as subpicotesla NV-diamond magnetic field sensitivity using the side-collection technique.

引用

页数：4

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