Preparations and applications of single color centers in diamond

Ju, Zhiping; Lin, Jie; Shen, Si; Wu, Botao; Wu, E

doi:10.1080/23746149.2020.1858721

Cited by 12 publications

(10 citation statements)

References 144 publications

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“…To date, the introduction of vacancies in diamond is mainly achieved by irradiation with ions, − protons, , α particles generated isotropically by 10 B neutron capture, electrons, , and laser techniques . Selection of the NV creation technique largely depends on the intended application, for example, whether the aim is to create single NV defects or their ensembles …”

Section: Overview Of Diamond Sensormentioning

confidence: 99%

“…84 Selection of the NV creation technique largely depends on the intended application, for example, whether the aim is to create single NV defects or their ensembles. 85 Position and Orientation Control of NV Centers. For most of the applications with NV centers, the precise control of their locations as well as quantity in diamond is of great significance.…”

Section: ■ Overview Of Diamond Sensormentioning

confidence: 99%

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Toward Quantitative Bio-sensing with Nitrogen–Vacancy Center in Diamond

et al. 2021

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The long-dreamed-of capability of monitoring the molecular machinery in living systems has not been realized yet, mainly due to the technical limitations of current sensing technologies. However, recently emerging quantum sensors are showing great promise for molecular detection and imaging. One of such sensing qubits is the nitrogen−vacancy (NV) center, a photoluminescent impurity in a diamond lattice with unique roomtemperature optical and spin properties. This atomic-sized quantum emitter has the ability to quantitatively measure nanoscale electromagnetic fields via optical means at ambient conditions. Moreover, the unlimited photostability of NV centers, combined with the excellent diamond biocompatibility and the possibility of diamond nanoparticles internalization into the living cells, makes NV-based sensors one of the most promising and versatile platforms for various life-science applications. In this review, we will summarize the latest developments of NV-based quantum sensing with a focus on biomedical applications, including measurements of magnetic biomaterials, intracellular temperature, localized physiological species, action potentials, and electronic and nuclear spins. We will also outline the main unresolved challenges and provide future perspectives of many promising aspects of NV-based bio-sensing.

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Section: Overview Of Diamond Sensormentioning

confidence: 99%

Section: ■ Overview Of Diamond Sensormentioning

confidence: 99%

Toward Quantitative Bio-sensing with Nitrogen–Vacancy Center in Diamond

et al. 2021

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“…The collection efficiency of photons emitted by diamond color centers is a major limitation for many quantum applications, affecting other interesting emitters such as the silicon (SiV), tin (SnV), or germanium vacancy (GeV) center similarly. − The high refractive index mismatch between diamond and the surrounding medium results in a considerable proportion of emitted photons being reflected internally, leading to a significant loss of emission signal from any emitter inside the crystal. In order to address this limitation, several techniques have been developed to efficiently address atomic defects inside single crystalline diamond, including cavity coupling − and nanostructuring. − Low-divergence coupling between nano-emitters and free-space has been demonstrated using low refractive index polymer structures, , though light extraction from semiconductor materials with high refractive index remains challenging.…”

Section: Introductionmentioning

confidence: 99%

Additive GaN Solid Immersion Lenses for Enhanced Photon Extraction Efficiency from Diamond Color Centers

Cheng,

Wessling,

Ghosh

et al. 2023

ACS Photonics

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Effective light extraction from optically active solid-state spin centers inside high-index semiconductor host crystals is an important factor in integrating these pseudo-atomic centers in wider quantum systems. Here, we report increased fluorescent light collection efficiency from laser-written nitrogen-vacancy (NV) centers in bulk diamond facilitated by micro-transfer printed GaN solid immersion lenses. Both laser-writing of NV centers and transfer printing of micro-lens structures are compatible with high spatial resolution, enabling deterministic fabrication routes toward future scalable systems development. The micro-lenses are integrated in a noninvasive manner, as they are added on top of the unstructured diamond surface and bonded by van der Waals forces. For emitters at 5 μm depth, we find approximately 2× improvement of fluorescent light collection using an air objective with a numerical aperture of NA = 0.95 in good agreement with simulations. Similarly, the solid immersion lenses strongly enhance light collection when using an objective with NA = 0.5, significantly improving the signal-to-noise ratio of the NV center emission while maintaining the NV’s quantum properties after integration.

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“…in transparent media via predetermined, well-controlled laser energy deposition inside the focal waist in their bulk [ 1 ]. In diamond materials these ultrafast laser writing technologies were harnessed for the inscription of single photoluminescent NV centers in synthetic electronic-grade low-nitrogen diamonds [ 2 ], or for marking high-nitrogen natural diamonds via the bulk inscription of photoluminescent QR code arrays [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Vacancy-Mediated Aggregation, Dissociation, and Splitting of Nitrogen Centers in Natural Diamond Excited by Visible-Range Femtosecond Laser Pulses

et al. 2023

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Natural IaA+B diamonds were exposed in their bulk by multiple 0.3 ps, 515 nm laser pulses focused by a 0.25 NA micro-objective, producing in the prefocal region (depth of 20–50 μm) a bulk array of photoluminescent nanostructured microtracks at variable laser exposures and pulse energies. These micromarks were characterized at room (25°) and liquid nitrogen cooling (−120 °C) temperatures through stationary 3D scanning confocal photoluminescence (PL) microspectroscopy at 405 and 532 nm excitation wavelengths. The acquired PL spectra exhibit a linearly increasing pulse-energy-dependent yield in the range of 575 to 750 nm (NV0, NV- centers) at the expense of the simultaneous reductions in the blue–green (450–570 nm; N3a, H4, and H3 centers) and near-IR (741 nm; V0 center) PL yield. A detailed analysis indicates a low-energy rise in PL intensity for B2-related N3a, H4, and H3 centers, while at higher, above-threshold pulse energies it decreases for the H4, H3, and N3a centers, converting into NV centers, with the laser exposure effect demonstrating the same trend. The intrinsic and (especially) photo-generated vacancies were considered to drive their attachment as separate species to nitrogen centers at lower vacancy concentrations, while at high vacancy concentrations the concerted splitting of highly aggregated nitrogen centers by the surrounding vacancies could take place in favor of resulting NV centers.

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Preparations and applications of single color centers in diamond

Cited by 12 publications

References 144 publications

Toward Quantitative Bio-sensing with Nitrogen–Vacancy Center in Diamond

Toward Quantitative Bio-sensing with Nitrogen–Vacancy Center in Diamond

Additive GaN Solid Immersion Lenses for Enhanced Photon Extraction Efficiency from Diamond Color Centers

Nanoscale Vacancy-Mediated Aggregation, Dissociation, and Splitting of Nitrogen Centers in Natural Diamond Excited by Visible-Range Femtosecond Laser Pulses

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