Foundations for Nanoscale resolution magnetic resonance studies of spin dynamics and defect properties in diamond nanostructures
Abstract
The objective of this program is to establish the understanding and experimental foundations required to perform nuclear magnetic resonance imaging of a biomolecule. The goal of this program is to establish the understanding and experimental foundations for nuclear magnetic resonance imaging of a biomolecule. In pursuit of this goal the PI will perform three tasks: 1. Move beyond conventional NV-based magnetic resonance techniques to develop non-resonant broadband optical detection of the ferromagnetic moment of target spin using diamond NV centers. The implementation of off-resonant detection will provide greater experimental flexibility by relaxing the experimental field and frequency constraints for detecting magnetic spin resonance. This is particularly important for accommodating the large magnetic field gradients needed for achieving maximum spatial resolution. The approach will employ confocal optical microscopy, pulsed magnetic resonance and custom fabricated NV-diamond samples to establish the underlying processes and optimize overall detection sensitivity and efficacy. 2. Demonstrate amplification of the target spin signal by introducing an intervening low-loss YIG ferromagnet. The task will seek to enhance the target spin signal by using it to excite the magnetic precession of the high Q YIG layer, which will then be detected with enhanced sensitivity by the NV center. Damping losses in the YIG will be reduced to an absolute minimum by introducing an actively controlled spin-current generated torque. 3. Explore patterning of the YIG layer to introduce an intrinsic magnetic- field gradient that will enable higher resolution imaging. The goal will be to identify an FM amplifier structure and geometrical configuration that will optimize imaging while maintaining good coupling of the target spin to the dynamic magnetization modes of the FM amplifier.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 22, 2017
- Source ID
- W911NF1610547
Entities
People
- Peter Hammel
Organizations
- Army Contracting Command
- Ohio State University
- United States Army