Nanoscale Imaging and Control of Hexagonal Boron Nitride Single Photon Emitters by a Resonant Nanoantenna

Nicola Palombo Blascetta; Matz Liebel; Xiaobo Lu; Takashi Taniguchi; Kenji Watanabe; Dmitri K. Efetov; Niek F. Van Hulst

doi:10.1021/acs.nanolett.9b05268

Nanoscale Imaging and Control of Hexagonal Boron Nitride Single Photon Emitters by a Resonant Nanoantenna

Nicola Palombo Blascetta, Matz Liebel, Xiaobo Lu, Takashi Taniguchi, Kenji Watanabe, Dmitri K. Efetov, Niek F. Van Hulst

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Defect centers in two-dimensional hexagonal boron nitride (hBN) are drawing attention as single-photon emitters with high photostability at room temperature. With their ultrahigh photon-stability, hBN single-photon emitters are promising for new applications in quantum technologies and for 2D-material based optoelectronics. Here, we control the emission rate of hBN-defects by coupling to resonant plasmonic nanocavities. By deterministic control of the antenna, we acquire high-resolution emission maps of the single hBN-defects. Using time-gating, we can discriminate the hBN-defect emission from the antenna luminescence. We observe sharp dips (40 nm fwhm) in emission, together with a reduction in luminescence lifetime. Comparing with finite-difference time-domain simulations, we conclude that both radiative and nonradiative rates are enhanced, effectively reducing the quantum efficiency. Also, the large refractive index of hBN largely screens off the local antenna field enhancement. Finally, based on the insight gained we propose a close-contact design for an order of magnitude brighter hBN single-photon emission.

Original language	English
Pages (from-to)	1992-1999
Journal	Nano Letters
Volume	20
Issue number	3
DOIs	https://doi.org/10.1021/acs.nanolett.9b05268
Publication status	Published - 11 Mar 2020
Externally published	Yes

Funding

N.F.v.H. acknowledges the financial support by the European Commission through ERC Advanced Grant 670949-LightNet. D.K.E. acknowledges support the H2020 Programme under Grant Agreement 820378, Project: 2D SIPC and the La Caixa Foundation. Authors acknowledge support by the Ministry of Science, Innovation & Universities (RTI2018-099957-J-I00 and PGC2018-096875-B-I00), the Ministry of Economy (FIS2015-69258-P, BES-2016-078727, and “Severo Ochoa” program for Centers of Excellence in R&D SEV-2015-0522), the Catalan AGAUR (2017SGR1369), Fundació Privada Cellex, Fundació Privada Mir-Puig, and Generalitat de Catalunya through the CERCA program. We thank Kevin Schädler for help in the initial phase of hBN sample fabrication.

Funders	Funder number
FUNDACIÓ Privada MIR-PUIG
H2020 Programme
Ministry of Science, Innovation & Universities	PGC2018-096875-B-I00, RTI2018-099957-J-I00
Fundación Cellex
Horizon 2020 Framework Programme	820378, 670949
European Commission
European Research Council
Generalitat de Catalunya
Agència de Gestió d'Ajuts Universitaris i de Recerca	2017SGR1369
Ministry of Economy	BES-2016-078727, FIS2015-69258-P, SEV-2015-0522
Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona

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title = "Nanoscale Imaging and Control of Hexagonal Boron Nitride Single Photon Emitters by a Resonant Nanoantenna",

abstract = "Defect centers in two-dimensional hexagonal boron nitride (hBN) are drawing attention as single-photon emitters with high photostability at room temperature. With their ultrahigh photon-stability, hBN single-photon emitters are promising for new applications in quantum technologies and for 2D-material based optoelectronics. Here, we control the emission rate of hBN-defects by coupling to resonant plasmonic nanocavities. By deterministic control of the antenna, we acquire high-resolution emission maps of the single hBN-defects. Using time-gating, we can discriminate the hBN-defect emission from the antenna luminescence. We observe sharp dips (40 nm fwhm) in emission, together with a reduction in luminescence lifetime. Comparing with finite-difference time-domain simulations, we conclude that both radiative and nonradiative rates are enhanced, effectively reducing the quantum efficiency. Also, the large refractive index of hBN largely screens off the local antenna field enhancement. Finally, based on the insight gained we propose a close-contact design for an order of magnitude brighter hBN single-photon emission.",

author = "{Palombo Blascetta}, Nicola and Matz Liebel and Xiaobo Lu and Takashi Taniguchi and Kenji Watanabe and Efetov, {Dmitri K.} and {Van Hulst}, {Niek F.}",

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doi = "10.1021/acs.nanolett.9b05268",

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AU - Palombo Blascetta, Nicola

AU - Liebel, Matz

AU - Lu, Xiaobo

AU - Taniguchi, Takashi

AU - Watanabe, Kenji

AU - Efetov, Dmitri K.

AU - Van Hulst, Niek F.

PY - 2020/3/11

Y1 - 2020/3/11

N2 - Defect centers in two-dimensional hexagonal boron nitride (hBN) are drawing attention as single-photon emitters with high photostability at room temperature. With their ultrahigh photon-stability, hBN single-photon emitters are promising for new applications in quantum technologies and for 2D-material based optoelectronics. Here, we control the emission rate of hBN-defects by coupling to resonant plasmonic nanocavities. By deterministic control of the antenna, we acquire high-resolution emission maps of the single hBN-defects. Using time-gating, we can discriminate the hBN-defect emission from the antenna luminescence. We observe sharp dips (40 nm fwhm) in emission, together with a reduction in luminescence lifetime. Comparing with finite-difference time-domain simulations, we conclude that both radiative and nonradiative rates are enhanced, effectively reducing the quantum efficiency. Also, the large refractive index of hBN largely screens off the local antenna field enhancement. Finally, based on the insight gained we propose a close-contact design for an order of magnitude brighter hBN single-photon emission.

AB - Defect centers in two-dimensional hexagonal boron nitride (hBN) are drawing attention as single-photon emitters with high photostability at room temperature. With their ultrahigh photon-stability, hBN single-photon emitters are promising for new applications in quantum technologies and for 2D-material based optoelectronics. Here, we control the emission rate of hBN-defects by coupling to resonant plasmonic nanocavities. By deterministic control of the antenna, we acquire high-resolution emission maps of the single hBN-defects. Using time-gating, we can discriminate the hBN-defect emission from the antenna luminescence. We observe sharp dips (40 nm fwhm) in emission, together with a reduction in luminescence lifetime. Comparing with finite-difference time-domain simulations, we conclude that both radiative and nonradiative rates are enhanced, effectively reducing the quantum efficiency. Also, the large refractive index of hBN largely screens off the local antenna field enhancement. Finally, based on the insight gained we propose a close-contact design for an order of magnitude brighter hBN single-photon emission.

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DO - 10.1021/acs.nanolett.9b05268

M3 - Article

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SP - 1992

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JO - Nano Letters

JF - Nano Letters

IS - 3

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Nanoscale Imaging and Control of Hexagonal Boron Nitride Single Photon Emitters by a Resonant Nanoantenna

Abstract

Funding

UN SDGs

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