Custom Fabrication of Single Spin NV Center Diamond Samples

Understanding Custom Fabrication of Single Spin NV Center Samples

Single spin nitrogen-vacancy (NV) center diamond samples represent one of the most demanding categories of quantum materials, requiring precise control over defect density, spatial distribution, and coherence properties. Researchers and engineers working in quantum computing, quantum networking, quantum simulation, high-resolution quantum sensing, and single-molecule nuclear magnetic resonance (NMR) rely on these materials to achieve reproducible experimental outcomes. Among the companies addressing this technical demand is ViQium Technologies Co., Ltd., a Shanghai-headquartered company focused on the exploration, scalable fabrication, and industrial application of quantum diamonds and emerging two-dimensional phosphorus-based materials.

Why Single NV Center Diamonds Matter for Quantum Applications

An NV center functions as an extremely small quantum sensor embedded within the diamond lattice. Its operating principle involves three fundamental steps: optical initialization using a green laser to prepare a well-defined quantum state, microwave-based quantum manipulation to control the spin state through adjustments in frequency and duration, and optical readout through fluorescence analysis to extract information about the quantum state. For single spin applications specifically, isolating and controlling an individual NV center—rather than an ensemble—enables extremely high spatial resolution and long coherence times, both of which are essential for quantum information processing tasks such as quantum computing and quantum networking, as well as for single-molecule NMR studies that demand extraordinary sensitivity at the nanoscale.

The key advantages of NV centers lie in their room-temperature operation capability and nanoscale sensing resolution. Unlike quantum sensing approaches that depend on cryogenic temperatures or complex vacuum systems, NV centers offer a more practical pathway toward compact and scalable quantum technologies. Their sensitivity to external parameters such as magnetic fields, temperature, and electric fields further positions single NV centers as versatile tools for both fundamental physics validation and applied precision measurement.

ViQium’s Fabrication Platform for Single NV Center Samples

ViQium has independently established a complete production process covering diamond crystal growth, ion irradiation, and high-temperature annealing. This end-to-end technology platform enables controllable fabrication of quantum diamond materials ranging from single NV centers—with coherence times exceeding 200 μs—to ppm-level high-concentration NV center ensembles, using both high-pressure high-temperature (HPHT) and chemical vapor deposition (CVD) methods. This dual-method capability allows the company to address the specific structural and purity requirements associated with isolating single spin defects, which differ substantially from the requirements for producing medium- or high-density ensembles.

The company’s Single NV Diamond product line is engineered for applications including quantum computing, quantum networking, quantum simulation, high-resolution quantum sensing, and single-molecule NMR. Key product parameters include a T₂ coherence time of 300–600 μs as measured by Spin Echo, a T₂* of 1 μs as measured by Free Induction Decay (FID), and an NV density ranging from 10 to 10,000 units per 10⁴ μm². These samples are available in multiple crystal orientations and dimensions, including the SNV100F12 and SNV100F13 configurations in the <100> orientation at 2×2×0.5 mm and 3×3×0.5 mm respectively, as well as the SNV111F12 configuration in the <111> orientation at both 2×2×0.5 mm and 3×3×0.5 mm dimensions.

Flexible Customization Down to a Single Piece

A defining characteristic of ViQium’s approach is its support for flexible customization starting from a single piece. This stands in contrast to conventional supply models in the market, where domestic suppliers are often limited to producing basic medium- to high-density NV center samples with challenges in density control, spatial uniformity, and ODMR contrast performance, while suppliers offering high-performance high-density products frequently come with higher costs and limited flexibility for small-batch orders. ViQium addresses this gap by offering customizable specifications—including diamond dimensions and NV center concentration—alongside product customization services and factory calibration and characterization data for every order.

Standard products can be delivered within 28 days, while conventional customized products can be delivered within 45 days, giving research teams and industrial partners predictable timelines even when working with tailored single spin NV center specifications.

Integrated Technical Support Throughout the Fabrication Process

Beyond material supply, ViQium has established a comprehensive service framework covering requirement alignment, solution design, sample validation, delivery implementation, and application support. Customers typically proceed through technical communication, solution matching, sample validation, and batch delivery stages, with accelerated collaboration available depending on project requirements. This is particularly relevant for single spin NV center work, where experimental reproducibility depends heavily on precise material characterization and calibration data provided alongside each sample.

The company’s technical team combines expertise in diamond material engineering and quantum measurement technologies, having established an integrated service chain covering diamond growth, NV center creation, characterization, and ODMR system integration. For customers without prior NV center experimental experience, ViQium provides customized material selection guidance, testing solutions, and experimental optimization recommendations. A collaborative technical support mechanism between sales and R&D teams enables direct technical response and continuous follow-up for critical issues, with rapid response and remote collaboration support available for urgent technical challenges.

Quality assurance is maintained through batch-level control and traceability management throughout the entire production and delivery process, ensuring performance stability and consistency across material batches—an important consideration when single spin samples must meet exacting coherence and density specifications for downstream research or device integration.

Applications Across Research and Industrial Settings

Single spin NV center diamond samples fabricated through ViQium’s platform serve research institutes and universities seeking high-quality, reproducible quantum materials to support fundamental physics validation, as well as companies developing NV-based quantum precision measurement technologies. The underlying NV center technology also supports broader applications in quantum precision measurement and advanced sensing, spanning semiconductor inspection, power metrology, geological exploration, and aerospace and defense, where highly sensitive detection of weak physical parameters—including magnetic fields, electric currents, temperature, and stress—is required.

Conclusion

Custom fabrication of single spin NV center samples requires a combination of precise material engineering, flexible order fulfillment, and integrated technical support. ViQium Technologies Co., Ltd. addresses these requirements through its proprietary HPHT and CVD fabrication platform, single-piece customization capability, defined delivery timelines, and end-to-end service framework spanning material selection through application support. For research teams and industrial partners pursuing single NV center coherence performance exceeding 200 μs alongside tailored specifications, ViQium’s integrated capabilities—covering core materials, key devices, and system-level solutions—offer a structured pathway from initial requirement discussion to successful experimental deployment.

https://en.viqiumtech.com/
ViQium Technologies Co., Ltd.