Achieving High Sensitivity in Cavity Optomechanical Magnetometry
Abstract
Magnetometers are important for diverse applications such as geological surveys, material science, medical imaging, and defence [1]. For many of these applications sensitivity is a key metric. The current state-of-the- art in ultra-sensitive magnetometry is provided by Superconducting Quantum Interference Devices (SQUIDs) and Spin Exchange Relaxation Free magnetometers (SERFs), which enable detection of pico- to fem-to tesla magnetic fields. However, technical limitations constrain the breadth of applications. SQUIDs require a cryogenic environment, increasing complexity, cost, size, and power consumption. SERFs typically have sub-kHz bandwidth, are difficult to integrate, and require magnetic shielding due to their low dynamic range [2, 3]. By contrast, magnetostrictive magnetometers suffer none of these drawbacks, but typically have two to five orders of magnitude worse sensitivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 09, 2018
- Accession Number
- AD1067179
Entities
People
- Warwick P. Bowen
Organizations
- University of Queensland