High-efficiency fluorescence collection for NV- center ensembles in diamond

被引：41

作者：

Xu, Lixia ^{[1
]}

Yuan, Heng ^{[1
,2
]}

Zhang, Ning ^{[1
]}

Zhang, Jixing ^{[1
]}

Bian, Guodong ^{[1
]}

Fan, Pengcheng ^{[1
]}

Li, Mingxin ^{[1
]}

Zhang, Chen ^{[1
]}

Zhai, Yueyang ^{[1
,2
]}

Fang, Jiancheng ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Instrumentat & Optoelect Engn, Beijing 100191, Peoples R China

[2] Minist Ind & Informat Technol Quantum Sensing Tec, Key Lab, Beijing 100191, Peoples R China

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 08期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

MAGNETOMETER;

D O I：

10.1364/OE.27.010787

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The negatively charged nitrogen vacancy (NV-) center ensembles in diamond have been demonstrated to be a promising platform for quantum metrology, but the poor fluorescence collection efficiency of a microscope objective limits the sensitivity of the NV- based sensors. Here we present a method for increasing the collected fluorescence intensity with a total internal reflection (TIR) lens. The detected fluorescence intensity is increased by approximately a factor of 56 compared with detection using a microscope objective with NA = 0.55, leading to a collection efficiency of 47.7% +/- 3.1%. The signal-to-noise ratio is improved by a factor of 7.6 using the TIR lens. The proposed method is of great significance for collecting fluorescence from NV- centers in a large volume and can be used in weak fluorescence detection systems. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：10787 / 10797

页数：11

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