Spatially Resolved Quantum Sensing with High-Density Bubble-Printed Nanodiamonds

Area of Science:

• Nanotechnology
• Quantum Science
• Materials Science

Background:

• Nitrogen-vacancy (NV^-) centers in nanodiamonds are promising for quantum sensing, bioimaging, and photonics.
• Current fabrication methods face challenges in achieving high-resolution patterning with sufficient throughput for practical applications.

Purpose of the Study:

• To introduce a novel direct laser-writing bubble printing technique for precise 2D nanodiamond pattern fabrication.
• To demonstrate the utility of these patterns in high-resolution thermal imaging and quantum sensing.

Main Methods:

• Direct laser-writing bubble printing technique for fabricating 2D nanodiamond patterns.
• Characterization of printed nanodiamonds for packing density, photoluminescence, and optically detected magnetic resonance (ODMR) signals.
• Spatially resolved ODMR for mapping 2D temperature gradients using widefield lock-in fluorescence imaging.

Main Results:

• Achieved precise 2D nanodiamond patterning with high packing density.
• Demonstrated strong photoluminescence and robust ODMR signals from printed nanodiamonds.
• Successfully mapped 2D temperature gradients with high frame rate widefield imaging.

Conclusions:

• The laser-writing bubble printing technique overcomes limitations in nanodiamond patterning for practical applications.
• This advancement enables the integration of nanodiamond quantum sensors into devices for high-resolution thermal imaging and biosensing.
• Opens new avenues for advanced quantum technologies and sensitive diagnostics.