Photodynamics and quantum efficiency of germanium vacancy color centers in diamond

被引：21
|
作者：
Nguyen, Minh [1 ]
Nikolay, Niko [2 ]
Bradac, Carlo [1 ]
Kianinia, Mehran [1 ]
Ekimov, Evgeny A. [3 ,4 ]
Mendelson, Noah [1 ]
Benson, Oliver [2 ]
Aharonovich, Igor [1 ]
机构：
[1] Univ Technol Sydney, Sch Math & Phys Sci, Ultimo, NSW, Australia
[2] Humboldt Univ, AG Nanoopt, Berlin, Germany
[3] Russian Acad Sci, Inst High Pressure Phys, Troitsk, Russia
[4] Russian Acad Sci, Lebedev Phys Inst, Moscow, Russia
来源：
ADVANCED PHOTONICS | 2019年 / 1卷 / 06期
基金：
澳大利亚研究理事会; 俄罗斯科学基金会;
关键词：
nanodiamond; germanium vacancy; color center; quantum efficiency;
D O I：
10.1117/1.AP.1.6.066002
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Color centers in diamond-especially group IV defects-have been advanced as a viable solidstate platform for quantum photonics and information technologies. We investigate the photodynamics and characteristics of germanium-vacancy (GeV) centers hosted in high-pressure high-temperature diamond nanocrystals. Through back-focal plane imaging, we analyze the far-field radiation pattern of the investigated emitters and derive a crossed-dipole emission, which is strongly aligned along one axis. We use this information in combination with lifetime measurements to extract the decay rate statistics of the GeV emitters and determine their quantum efficiency, which we estimated to be similar to(22 +/- 2)%. Our results offer further insight into the photodynamic properties of the GeV center in nanodiamonds and confirm its suitability as a desirable system for quantum technologies.
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收藏
页数：7
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