Fluorescence enhancement of a single germanium vacancy center in a nanodiamond by a plasmonic Bragg cavity

被引：21
作者：
Kumar, Shailesh [1 ]
Wu, Cuo [1 ,2 ]
Komisar, Danylo [1 ]
Kan, Yinhui [1 ,3 ]
Kulikova, Liudmilla F. [4 ]
Davydov, Valery A. [4 ]
Agafonov, Viatcheslav N. [5 ]
Bozhevolnyi, Sergey, I [1 ,6 ]
机构：
[1] Univ Southern Denmark, Ctr Nano Opt, Campusvej 55, DK-5230 Odense M, Denmark
[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China
[3] Shanghai Jiao Tong Univ, Inst Engn Thermophys, Shanghai 200240, Peoples R China
[4] Russian Acad Sci, LF Vereshchagin Inst High Pressure Phys, Moscow 142190, Russia
[5] Univ Tours, GREMAN, UMR CNRS CEA 7347, F-37200 Tours, France
[6] Univ Southern Denmark, Danish Inst Adv Study, Campusvej 55, DK-5230 Odense M, Denmark
来源：
JOURNAL OF CHEMICAL PHYSICS | 2021年 / 154卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
Germanium;
D O I：
10.1063/5.0033507
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Germanium vacancy (GeV) centers in diamonds constitute a promising platform for single-photon sources to be used in quantum information technologies. Emission from these color centers can be enhanced by utilizing a cavity that is resonant at the peak emission wavelength. We investigate circular plasmonic Bragg cavities for enhancing the emission from single GeV centers in nanodiamonds (NDs) at the zero phonon line. Following simulations of the enhancement for different configuration parameters, the appropriately designed Bragg cavities together with out-coupling gratings composed of hydrogen silsesquioxane ridges are fabricated around the NDs containing nitrogen vacancy centers deposited on a silica-coated silver surface. We characterize the fabricated configurations and finely tune the cavity parameters to match the GeV emission. Finally, we fabricate the cavity containing a single GeV-ND and compare the total decay-rate before and after cavity fabrication, finding a decay-rate enhancement of similar to 5.5 and thereby experimentally confirming the feasibility of emission enhancement with circular plasmonic cavities.
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页数：7
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