Magnetization‐induced Second Harmonic Generation

Abstract

The magnetization‐induced effects in the nonlinear optical response of magnetic media—magnetization‐induced second‐harmonic Generation (MSHG)—lead to very strong and novel nonlinear magneto‐optical (MO) phenomena that appear to be very sensitive to magnetic interface properties. This surface/interface sensitivity of MSHG in combination with the very large MO effects has led to a fast development of this technique over the past decade. On the one hand, an extreme sensitivity of MSHG to the electronic and magnetic structure of clean surfaces has been successfully demonstrated. On the other hand, the penetration depth of light allows one to use this sensitivity to study buried interfaces in multilayer systems. Further experimental developments of the MSHG technique, like space‐ and time resolution as well as magnetization sensitive sum frequency generation, appear to be promising as well.

Control of magnetic contrast with nonlinear magneto-plasmonics

“…The magnetic contrast for a one-jump hysteresis loop can be expressed as 7 : where I(+M) and I(−M) are intensities for the two magnetization states. The magnetic contrast can be understood as the height of the jump in the hysteresis loop divided by the average intensity of both magnetizations.…”

“…As a surface sensitive magneto-optical effect, magnetic second-harmonic generation (MSHG) is sensitive to the interface or surface magnetization where the inversion symmetry is broken. MSHG contains nonzero magnetic components of the second-order nonlinear susceptibility tensor which makes MSHG extremely sensitive to subtle modifications of the spin-polarized electronic structure of transition metal surfaces 7 8 9 10 11 , the same region where surface plasmons (SP) are present. The surface sensitivity of MSHG is different from the bulk effect of magneto-optical Kerr effect (MOKE) 12 13 , which is often used in MP systems.…”

“…The L-component corresponds to the magnetization (M) component parallel to the plane-of-incidence, i.e. along the axis [−110], while T-component is perpendicular 7 , i.e. along the axis [110].…”

Nonlocal nonlinear magneto-optical response of a magnetoplasmonic crystal

“…In general, a nonlocal quadrupole SHG contribution is described as P (2ω,Q) = χ (2) : E∇ E. Similarly to what has been said about the dipole SHG, magnetic and crystallographic parts of P (2ω,Q) can be distinguished, 26 which gives…”

Ab initio study of the enantio-selective magnetic-field-induced second harmonic generation in chiral molecules

“…43 and the theoretical analysis by Kielich and Zawodny, 44 and Manakov and co-workers. 45 Magnetization induced SHG has also been reported, 46 in films, 47 and solids. 48,49 Here we study the case where, as in SFG, the polarization measured after interaction of polarized radiation with a chiral sample, leading to frequency doubling, is different for the distinct enantiomers when the sample is subject to a static magnetic field.…”