Spin-based quantum sensing utilizes the quantum properties of spin systems to measure physical quantities such as magnetic fields and temperature with exceptional sensitivity and spatial resolution. However, the advantages of dense solid-state systems, such as enhanced sensitivity of ensemble NV centers in diamond, are often compromised by decoherence arising from dipolar interactions among NV centers and with surrounding bath spins.  Our group's research goals are to

• Decouple the interactions in ensemble NV centers by developing and implementing novel pulse sequences to extend the coherence time.

• Extend the coherence time using nuclear spin memory or entanglement-based protocols.

• Design and fabricate nano-photonic structures such as diamond nanopillars and membranes to enhance photon collection efficiency and reduce power consumption.

Conventional Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI) are powerful tools, but their spatial resolution is limited to the millimeter scale due to the sensitivity limitations of the induction-based detection schemes. By exploiting the atomic-scale size and magnetic-field sensitivity of diamond nitrogen-vacancy (NV) centers, we detect and image nuclear spins at the nanoscale. This approach unlocks new structural and functional insights into biological molecules and condensed matter systems. Our group's research goals are to: 

• Develop high-resolution NMR/MRI methodologies using single and ensemble NV centers

• Implement entangled quantum sensing protocols to surpass the standard quantum limit

• Design pulse sequences to decouple target spins from environmental noise

Our research aims to transition the Quantum Diamond Microscope (QDM) from laboratory setups into portable platforms. By harnessing its wide-field, high-resolution magnetic imaging capabilities, we focus on detecting and analyzing magnetic anomalies across diverse applications, including biological systems and semiconductor devices.  Our group's research goals are to: 

• Explore novel applications of the quantum diamond microscope(QDM)

• Develop AI-driven data analysis and machine learning techniques 

• Miniaturization of diamond NV magnetometers