An experimentally feasible magnetometer based on a dual-coupling optomechanical system is proposed, where the radiation-pressure coupling transduces magnetic signal to optical phase, and quadratic interaction induces periodic squeezing effect. The latter not only amplifies be measured, but also accelerates transducing rate characterized by an observable phase accumulation efficiency. In vicinit...

We review our ongoing work on deploying optical (atomic) magnetometry for measuring the magnetic response of magnetic nanoparticle (MNP) samples, yielding MNP size distributions, and other sample parameters like Néel relaxation time τ , saturation magnetisation Ms, anisotropy constant K and magnetic susceptibility χ. We address magnetorelaxation (MRX) signals, in which the decaying magnetisatio...