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 ∼5.5 and thereby experimentally confirming the feasibility of emission enhancement with circular plasmonic cavities.
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28 January 2021
Research Article|
January 27 2021
Fluorescence enhancement of a single germanium vacancy center in a nanodiamond by a plasmonic Bragg cavity
Special Collection:
Polariton Chemistry: Molecules in Cavities and Plasmonic Media
Shailesh Kumar
;
Shailesh Kumar
a)
1
Centre for Nano Optics, University of Southern Denmark
, Campusvej 55, Odense M DK-5230, Denmark
a)Author to whom correspondence should be addressed: shku@mci.sdu.dk
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Cuo Wu;
Cuo Wu
1
Centre for Nano Optics, University of Southern Denmark
, Campusvej 55, Odense M DK-5230, Denmark
2
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China
, Chengdu 610054, People’s Republic of China
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Danylo Komisar
;
Danylo Komisar
1
Centre for Nano Optics, University of Southern Denmark
, Campusvej 55, Odense M DK-5230, Denmark
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Yinhui Kan;
Yinhui Kan
1
Centre for Nano Optics, University of Southern Denmark
, Campusvej 55, Odense M DK-5230, Denmark
3
Institute of Engineering Thermophysics, Shanghai Jiao Tong University
, Shanghai 200240, China
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Liudmilla F. Kulikova;
Liudmilla F. Kulikova
4
L.F. Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences
, Troitsk, Moscow 142190, Russia
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Valery A. Davydov;
Valery A. Davydov
4
L.F. Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences
, Troitsk, Moscow 142190, Russia
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Viatcheslav N. Agafonov;
Viatcheslav N. Agafonov
5
GREMAN, UMR CNRS CEA 7347, University of Tours
, 37200 Tours, France
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Sergey I. Bozhevolnyi
Sergey I. Bozhevolnyi
1
Centre for Nano Optics, University of Southern Denmark
, Campusvej 55, Odense M DK-5230, Denmark
6
Danish Institute for Advanced Study, University of Southern Denmark
, Campusvej 55, DK-5230 Odense M, Denmark
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a)Author to whom correspondence should be addressed: shku@mci.sdu.dk
Note: This paper is part of the JCP Special Topic on Polariton Chemistry: Molecules in Cavities and Plasmonic Media.
J. Chem. Phys. 154, 044303 (2021)
Article history
Received:
October 16 2020
Accepted:
December 31 2020
Citation
Shailesh Kumar, Cuo Wu, Danylo Komisar, Yinhui Kan, Liudmilla F. Kulikova, Valery A. Davydov, Viatcheslav N. Agafonov, Sergey I. Bozhevolnyi; Fluorescence enhancement of a single germanium vacancy center in a nanodiamond by a plasmonic Bragg cavity. J. Chem. Phys. 28 January 2021; 154 (4): 044303. https://doi.org/10.1063/5.0033507
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