Accession Number:

AD1067179

Title:

Achieving High Sensitivity in Cavity Optomechanical Magnetometry

Descriptive Note:

Technical Report,01 Dec 2012,30 Nov 2015

Corporate Author:

The University of Queensland Brisbane Australia

Personal Author(s):

Report Date:

2018-11-09

Pagination or Media Count:

6.0

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.

Subject Categories:

  • Magnetic and Electric Field Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE