Wave propagation: Difference between revisions
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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 an external oscillating [[electrical field]] with the frequency <math>\omega</math>, which 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)|polarization]] waves should induce magnetization of opposite signs. | |||
The induced magnetization is comparable to the saturated magnetization of the media. | |||
== 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) | |||
[[Category:Optical phenomena]] | |||
[[Category:Electric and magnetic fields in matter]] | |||
Revision as of 06:08, 22 November 2013
The inverse Faraday effect is the effect opposite to the Faraday effect. A static magnetization is induced by an external oscillating electrical field with the frequency , which can be achieved with a high intensity laser pulse for example. The induced magnetization is proportional to the vector product of and :
![{\vec {M}}(0)\propto [{\vec {E}}(\omega )\times {\vec {E}}^{*}(\omega )]](https://wikimedia.org/api/rest_v1/media/math/render/svg/63f5726502d606cc88e70e94d7d6e56f5516c208)
From this equation we see that the circularly polarized light with the frequency should induce a magnetization along the wave vector . Because 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.
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)