Inverse Faraday effect
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The inverse Faraday effect is the effect opposite to the Faraday effect. A static magnetization <math>\vec{M}(0)</math> is induced by external oscilating electrical field with the frequency <math>\omega</math>, this can be achieved with a high intensity laser pulse for example. The induced magnetization is proportional to the vector product of <math>\vec{E}</math> and <math>\vec{E}^*</math>:
<math>\vec{M}(0)\propto[\vec{E}(\omega)\times\vec{E}^*(\omega)]</math>
From this equation we see that the circularly polarized light with the frequency <math>\omega</math> should induce a magnetization along the wave vector <math>\vec{k}</math>. Because <math>\vec{E}</math> is in the vector product, left- and right-handed polarization waves should induce magnetization of opposite signs.
The induced magnetization is comparable to the saturated magnetization of the media.
[edit] References
- R. Hertel, Microscopic theory of the inverse Faraday effect, http://arxiv.org/abs/cond-mat/0509060 (2005)
- A. V. Kimel, A. Kirilyuk, P. A. Usachev, R. V. Pisarev, A. M. Balbashov and Th. Rasing, Ultrafast non-thermal control of magnetization by instantaneous photomagnetic pulses, Nature 435, 655-657 (2005)sr:Инверзни Фарадејев ефекат
