71. Quantum Sensing in Micro-Architected Scaffolds
B. W. Blankenship†, Y. Rho†, Z. Jones, T. Meier, R. Li, E. Druga, H. Singh, X. Xia, A. Ajoy*, C. P. Grigoropoulos* [PDF] [SI]
arXiv:2502.16434 — ACS Appl. Mater. Interfaces 17, 69876 (2025)
Abstract:
Quantum sensing with nitrogen-vacancy centers in diamond has emerged as a powerful tool for measuring diverse physical parameters, yet the versatility of these measurement approaches is often limited by the achievable layout and dimensionality of bulk-crystal platforms. Here, we demonstrate a versatile approach to creating designer quantum sensors by surface-functionalizing multiphoton lithography microstructures with NV-containing nanodiamonds. We showcase this capability by fabricating a 150 μm x 150 μm x 150 μm triply periodic minimal surface gyroid structure with millions of attached nanodiamonds. We demonstrate a means to volumetrically image these structures using a refractive index matching confocal imaging technique, and extract ODMR spectra from 1.86 μm x 1.86 μm areas of highly concentrated nanodiamonds across a cross section of the gyroid. Furthermore, the high density of sensing elements enables ensemble temperature measurements with sensitivity of 0.548 °K/√Hz at 5 mW excitation power. This approach to creating quantum-enabled microarchitectures opens new possibilities for multimodal sensing in complex three-dimensional environments.
