Magneto Optical Sensing beyond the Shot Noise Limit
arXiv:2108.01242 · doi:10.1002/qute.202100107
Abstract
Magneto-optical sensors including spin noise spectroscopies and magneto-optical Kerr effect microscopies are now ubiquitous tools for materials characterization that can provide new understanding of spin dynamics, hyperfine interactions, spin-orbit interactions, and charge-carrier g-factors. Both interferometric and intensity-difference measurements can provide photon shot-noise limited sensitivity, but further improvements in sensitivity with classical resources require either increased laser power that can induce unwanted heating and electronic perturbations or increased measurement times that can obscure out-of-equilibrium dynamics and radically slow experimental throughput. Proof-of-principle measurements have already demonstrated quantum enhanced spin noise measurements with a squeezed readout field that are likely to be critical to the non-perturbative characterization of spin excitations in quantum materials that emerge at low temperatures. Here, we propose a truncated nonlinear interferometric readout for low-temperature magneto-optical Kerr effect measurements that is accessible with today's quantum optical resources. We show that 10 sensitivity is achievable with optical power as small as 1 W such that a realistic = 83 mK can be maintained in commercially available dilution refrigerators. The quantum advantage for the proposed measurements persists even in the limit of large loss and small squeezing parameters.
arXiv comment12 pages, 8 figures
References in corpus (23)
- Enhancing the sensitivity of the LIGO gravitational wave detector by using squeezed states of light
- Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
- Squeezed-Light Optical Magnetometry
- Spectroscopy of spontaneous spin noise as a probe of spin dynamics and magnetic resonance
- Ultrasensitive measurement of MEMS cantilever displacement sensitivity below the shot noise limit
- Proposal for Gravitational-Wave Detection Beyond the Standard Quantum Limit via EPR Entanglement
- Phase sensing beyond the standard quantum limit with a truncated SU(1,1) interferometer
- Polar Kerr Effect as Probe for Time-Reversal Symmetry Breaking in Unconventional Superconductors
- Quantum Plasmonic Sensors
- Quantum-Enhanced Plasmonic Sensing
- Semiconductor Spin Noise Spectroscopy: Fundamentals, Accomplishments, and Challenges
- Quantum-Enhanced continuous-wave stimulated Raman spectroscopy
- Modified Sagnac interferometer for high-sensitivity magneto-optic measurements atcryogenic temperatures
- Quantum Enhanced Magnetometer with Low-Frequency Squeezing
- Optimal phase measurements with bright and vacuum-seeded SU(1,1) interferometers
- Squeezed-light spin noise spectroscopy
- Truncated nonlinear interferometry for quantum enhanced atomic force microscopy
- Squeezing-enhanced Raman spectroscopy
- Optimized phase sensing in a truncated SU(1,1) interferometer
- A High-Resolution Combined Scanning Laser- and Widefield Polarizing Microscope for Imaging at Temperatures from 4 K to 300 K
- Polarization-Based Truncated SU(1,1) Interferometer based on Four-wave Mixing in Rb vapor
- Polarizers, optical bridges and Sagnac interferometers for nanoradian polarization rotation measurements
- Nonlinear optical magnetometry with accessible in situ optical squeezing