Deterministic placement of ultra-bright near-infrared color centers in arrays of silicon carbide micropillars Article Swipe

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Stefania Castelletto , Abdul Salam Al Atem , Faraz Ahmed Inam , H. J. von Bardeleben , Sophie Hameau , A. F. M. Almutairi , Gérard Guillot , Shin Sato , Alberto Boretti , Jean‐Marie Bluet ·

YOU? · · 2019 · Open Access · · DOI: https://doi.org/10.3762/bjnano.10.229

We report the enhancement of the optical emission between 850 and 1400 nm of an ensemble of silicon mono-vacancies (V Si ), silicon and carbon divacancies (V C V Si ), and nitrogen vacancies (N C V Si ) in an n-type 4H-SiC array of micropillars. The micropillars have a length of ca. 4.5 μm and a diameter of ca. 740 nm, and were implanted with H + ions to produce an ensemble of color centers at a depth of approximately 2 μm. The samples were in part annealed at different temperatures (750 and 900 °C) to selectively produce distinct color centers. For all these color centers we saw an enhancement of the photostable fluorescence emission of at least a factor of 6 using micro-photoluminescence systems. Using custom confocal microscopy setups, we characterized the emission of V Si measuring an enhancement by up to a factor of 20, and of N C V Si with an enhancement up to a factor of 7. The experimental results are supported by finite element method simulations. Our study provides the pathway for device design and fabrication with an integrated ultra-bright ensemble of V Si and N C V Si for in vivo imaging and sensing in the infrared.

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Semiconductor Device Fabrication

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Silicon carbide Materials science Photoluminescence Silicon Infrared Fabrication Optoelectronics Fluorescence Nanotechnology Optics Composite material Physics Pathology Alternative medicine Medicine

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Type: article
Language: en
Landing Page: https://doi.org/10.3762/bjnano.10.229
PDF: https://www.beilstein-journals.org/bjnano/content/pdf/2190-4286-10-229.pdf
OA Status: diamond
Cited By: 32
References: 74
Related Works: 10
OpenAlex ID: https://openalex.org/W2993949398

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DOI: https://doi.org/10.3762/bjnano.10.229

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Title: Deterministic placement of ultra-bright near-infrared color centers in arrays of silicon carbide micropillars

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Type: article

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Language: en

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Publication year: 2019

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Publication date: 2019-12-05

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Authors: Stefania Castelletto, Abdul Salam Al Atem, Faraz Ahmed Inam, H. J. von Bardeleben, Sophie Hameau, A. F. M. Almutairi, Gérard Guillot, Shin Sato, Alberto Boretti, Jean‐Marie Bluet

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Landing page: https://doi.org/10.3762/bjnano.10.229

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Concepts: Silicon carbide, Materials science, Photoluminescence, Silicon, Infrared, Fabrication, Optoelectronics, Fluorescence, Nanotechnology, Optics, Composite material, Physics, Pathology, Alternative medicine, Medicine

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Cited by: 32

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