Faraday effects emerging from the optical magnetic field
3 days ago
- #Faraday effect
- #inverse Faraday effect
- #magneto-optics
- The Faraday effect (FE) and inverse Faraday effect (IFE) are explored, highlighting the role of the optical magnetic field in light-spin interactions.
- The study shows that the magnetic component of light contributes to both FE and IFE, accounting for ~17% of the Verdet constant in Terbium-Gallium-Garnet (TGG) at 800 nm.
- The Verdet constants for FE and IFE are found to be different, indicating a breakdown of reciprocity between the two effects in ultrafast timescales.
- Optically induced torque in the IFE is shown to depend linearly on optical fluence and the difference between right and left circularly polarized light intensities (IRCP - ILCP).
- The study demonstrates that the torque can be induced by single pulses, multiple pulses, or continuous wave (CW) beams, with similar outcomes.
- The LLG (Landau-Lifshitz-Gilbert) framework is used to model the effects, showing that the optical magnetic field's contribution is significant but not sufficient to fully explain experimental observations.
- Future research directions include investigating the wavelength dependence of FE and the role of spin-orbit coupling.