The nitrogen-vacancy (NV) center in diamond is an increasingly popular quantum sensor for microscopy of electrical current, magnetization, and spins. However, efficient NV–sample integration with a robust, high-quality interface remains an outstanding challenge to realize scalable, high-throughput microscopy. In this work, we characterize a diamond micro-chip (DMC) containing a (111)-oriented NV ensemble and demonstrate its utility for high-resolution quantum microscopy. We perform strain imaging of the DMC and find minimal detrimental strain variation across a field of view of tens of micrometer. We find good ensemble NV spin coherence and optical properties in the DMC, suitable for sensitive magnetometry. We then use the DMC to demonstrate wide-field microscopy of electrical current and show that diffraction-limited quantum microscopy can be achieved. We also demonstrate the deterministic transfer of DMCs with multiple materials of interest for next-generation electronics and spintronics. Lastly, we develop a polymer-based technique for DMC placement. This work establishes the DMC's potential to expand the application of NV quantum microscopy in materials, device, geological, biomedical, and chemical sciences.

Shahidul Asif

Hang Chen

Johannes Cremer

Shantam Ravan

Jeyson Támara-Isaza

Saurabh Lamsal

Reza Ebadi

Yan Li

Ling-Jie Zhou

Cui-Zu Chang

John Q. Xiao

Amir Yacoby

Ronald L. Walsworth

Mark J. H. Ku

AVS Quantum Science

Diamond micro-chip for quantum microscopy

量子显微镜用金刚石微芯片

Diamond micro-chip for quantum microscopy

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Journal Info

Category	Quartile
QUANTUM SCIENCE & TECHNOLOGY	2