Nonlinear magneto-optical Kerr effects

Zvezdin, A. K.; Kubrakov, N. F.

doi:10.1134/1.558957

Cited by 15 publications

(8 citation statements)

References 25 publications

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“…is negative, i.e., self-defocusing. The self-defocusing effect is due to the reorientation Kerr effect (the magneto-optical Kerr effect) [17]. In particular, we observe that with increase of the silver nanoparticles concentration in the PVA polymer films the shape of the closed aperture one remains unchanged.…”

Section: Methodsmentioning

confidence: 69%

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Nonlinear optical characterization of the Ag nanoparticles doped in polyvinyl alcohol films

Ghanipour

Dorranian

2015

Opt. Spectrosc.

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The effect of silver nanoparticles doped in polyvinyl alcohol (PVA) on the nonlinear optical properties of composite films is studied experimentally. Samples are PVA films of 0.14 mm thickness doped with different concentrations of silver nanoparticles. Nonlinear optical properties of doped polymer films are studied experimentally employing Z-scan techniques. Experiments are performed using the second harmonic of a continuous Nd-Yag laser beam at 532 nm wavelength and 45 mW power. The effect of nonlinear refractive index of samples is obtained by measuring the profile of propagated beam through the samples and their nonlinear refractive index is found to be negative. The nonlinear absorption coefficient is calculated using open aperture Z-scan data while its nonlinear refractive index is measured using the closed aperture Z-scan data, leads to measuring the third order susceptibility |χ (3) |. Real and imaginary parts of the third-order nonlinear optical susceptibility |χ (3) | are decrease with increasing the concentration of Ag nanoparticles in the films. The values of thermo-optic coefficient are determined at different concentrations of silver nanoparticles for samples.

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Section: Methodsmentioning

confidence: 69%

“…The real and imaginary parts of χ (3) and NLA or gain. This can be understood by considering situations in which the nonlinear polarization is at one of the driving frequencies [17]. The real and imaginary parts of the third order nonlinear optical susceptibility χ (3) can be the following equations:…”

Section: Methodsmentioning

confidence: 99%

Nonlinear optical characterization of the Ag nanoparticles doped in polyvinyl alcohol films

Ghanipour

Dorranian

2015

Opt. Spectrosc.

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“…Hence, , and . The field can be expressed in terms of the reflection matrix: (6) where the -parameters are components of the vector (7) is the wave impedance of vacuum. Using (2), (4), (7), (6), and finally (1) SMOKE can be investigated.…”

Section: Results For Smokementioning

confidence: 99%

“…Once is known, formulas (6) and (7) can be applied to obtain the field . We substitute and for and in (6), double the wave number, take the values of the refractive indices and -parameters at to get the characteristic matrix of multilayer from (2) and then determine the reflection matrix components (4). Finally we use (1) to investigate SHMOKE.…”

Section: Extension To Shmokementioning

confidence: 99%

Simple model of second harmonic magneto-optical Kerr effects

Kubrakov

Atkinson²

2001

IEEE Trans. Magn.

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“…The magnetization of a material does not usually break this symmetry, but it can modify substantially the form of the nonlinear susceptibility for surface second harmonics generation [33,34]. This explains the fact that nonlinear MO effects usually exceed corresponding linear effects by several orders of magnitude [35][36][37][38][39][40][41][42]. Thus for granular Co-Cu magnetic films (thickness is 200 nm) in polar geometry the nonlinear Kerr effect is 8°, whereas the linear effect is no more than several tenths of a degree [38].…”

Section: Nonlinear Magnetooptical Effectsmentioning

confidence: 98%