铁电、铁磁和光学中的延迟电磁相互作用与非线性现象的起源
Retarded Electromagnetic Interaction and Origin of Non-linear Phenomena in Ferroelectrics, Ferromagnetics and Optics
摘要：
通过引入延迟电磁相互作用，可以得到铁电体的极化强度与电场强度、铁磁体的磁化强度与磁场强度之间的非线性关系。基于软模理论，可以很好地描述低频和中频交变电磁场中的电滞回线和磁滞回线，以及极化曲线和磁化曲线。非线性光学中的基本唯象公式也可以在高频场中得到。结果表明，所有这些非线性现象都源于延迟的电磁相互作用。
英文摘要：
The non-linear relations between polarization strength and electric field strength for ferroelectrics, as well as magnetization strength and magnetic field strength for ferromagnetics, can be achieved by introducing retarded electromagnetic interactions. The electric and magnetic hysteretic loops, as well as polarization and magnetization curves, can be described well based on soft mode theory in the alternating electromagnetic fields of low and medium frequencies. The fundamental phenomenological formula in non-linear optics can also be obtained in high frequency fields. The results show that all of these non-linear phenomena originate from retarded electromagnetic interaction.
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