The diverse field of NMR spectroscopy and imaging has been plagued by low detection sensitivity since its inception. Among the various methods divised to mitigate this, dynamic nuclear polarization (DNP) has proven to be a powerful technique for enhancing the detection sensitivity by orders of magnitude. In DNP, a microwave pulse sequence is utilized to transfer the larger polarization of the surrounding electrons to nearby nuclei, thereby enhancing the detected signal.

The highly non-uniform magnetic fields required for ultrasensitive spin detection come with their own challenges: the conventional methods for spin control in NMR become unusable. This is especially detrimental since the imaging resolution is limited by the spin coherence time, which can only be increased using sophisticated dynamical decoupling sequences that require high-fidelity spin control. To mitigate this, we utilize optimization-based quantum control algorithms that address the large field inhomogeneities in our set up, while also adhering to the amplitude and bandwidth constraints of the experimental setup [1], [2].

Nanofabrication stands at the forefront of modern physics research, offering a gateway to the manipulation of matter at the atomic and molecular scale. Our research goals require the fabrication of various such nanoscale devices. This provides unique opportunities to engage in cutting-edge fabrication projects that not only contribute to scientific advancement but also provide a hands-on experience in a cleanroom environment. The Quantum Nano Fabrication and Characterization Facility (QNFCF) at the University of Waterloo hosts a state-of-the-art cleanroom, numerous equipment and a dedicated staff for training and maintainance of the facility.