IntroductionExperimental observation of transverse MO effectProperties of transverse MO effectOrigin of transverse MO effectTransverse EllipticityTwo contributions to transverse MO effectMagnetizationdependent optical lossCalculations of transverse MO effect in the case of multilayer structureOptical excitation of spinpolarized electrons utilizing transverse MOPlasmonsGiant Enhancement of Transverse MO effectHistory and Future 
Transverse MagnetoOptical effect
Magnetizationdependent optical lossThe expression, which described optical loss in the case of transverse MO, effect will be derived. Utilizing a few very general facts, the important properties of the effect are derived. Expression (14) can be applied to calculate and estimate the transverse MO effect for a variety of possible structure. It can be applied to plasmons, hybrids waveguides, slab and rib waveguides and more. Eqn.(14) is main result. This method may be used for calculations of the transverse MO effect in devices with complex shape. For the devices with less complex shape the usage of simple rigorous method is preferable.
In the following we will calculate the magnetizationdependent loss for a very general structure, which contains a ferromagnetic metals and a transparent dielectric. The metals absorb the light and there is MO effect in the metal. The light along z direction. Let us to put as less limitations on the structure as possible. Only we assume that the light is confined inside the structure, so
Because there is a metal inside the structure, light experience an optical loss, so there is a loss of energy, when the light propagates along z direction. The electrical and magnetic field of light can be described as where A(x,y,z) is the slowlyvaried function along z. nz is the effective refractive index and kz is the absorption coefficient. Since the wave is absorbed, the energy flow is decreasing along z axis and Poynting vector is The optical loss can be calculated as Poynting theorem reads where U is the energy density of the electromagnetic wave. Integrating Exp.(4) we obtain
Since there is no flux when Substituting (6) into (3) gives Since an energy dissipation is only inside metal, (7) is simplified to The energy dissipation in the metal is calculated as Next we will use averaging over time, so parts, which have exp term, will become zero The permittivity tensor for metal is and (9) is simplified as where is the transverse ellipticity. Substituting (9) into (8), we have in the case when the metal is singlelayered and semiinfinite, (12) will be In the case when the magnetization of is reversed the permittivity tensor of the metal changes to and optical loss will be if the field distribution does not change MO figureofmerit will be Exp. (17) describes bulk contribution to transverse MO effect. It is linearly proportional to the transverse ellipticity. The ratio of integrals in right part of (14) describes the interface contribution. Even it is more complicated, but it also is proportional to the transverse ellipticity.

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