Discovered that bright-dark state mixing in nearly degenerate NV centers enables novel thermometry protocols functioning without bias fields, advancing quantum sensing for biological and mobile applications with nanoscale spatial resolution.

Discovered that bright-dark state mixing in nearly degenerate NV centers enables novel thermometry protocols functioning without bias fields, advancing quantum sensing for biological and mobile applications with nanoscale spatial resolution.
High-angle nitrogen ion implantation (>60°) enables efficient creation of shallow NV− centers in diamond with ~10% yields—50-100× higher than conventional methods—while maintaining quantum coherence suitable for nanoscale spin sensing applications.
Achieved quantum-projection-noise-resolved readout of dense NV ensembles, revealing how dipolar interactions reshape noise into anisotropic profiles—a major step toward spin squeezing and entanglement-enhanced quantum sensing.
Novel optimization-based pulse shaping enables selective manipulation of NV center ensembles without external bias fields, achieving both orientation and transition selectivity—advancing zero-field quantum magnetometry through quantum optimal control.
Solution-phase fluorination of nanodiamonds achieves ~90% NV⁻ fraction—among the highest reported—using mild, scalable chemistry. Two complementary routes (Balz–Schiemann and XeF₂) stabilize nitrogen-vacancy centers for quantum sensing applications.
NV-center quantum sensors combined with digital lock-in amplification achieve 126 nT/Hz^1/2 magnetic field sensitivity and sub-second full-field imaging, enabling rapid non-destructive testing and fault diagnosis of RF devices.