Role of optical interference effects in the enhancement of magnetization-induced second-harmonic generation
Role of optical interference effects in the enhancement of magnetization-induced second-harmonic generation
复制标题
光学干涉效应在增强磁化引起的二次谐波产生中的作用
DOI：
10.1007/s003400050662
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
O. Aktsipetrov
中科院分区：
文献类型：
--
作者：
T. Murzina;A. A. Fedyanin;T. V. Misuryaev;G. Khomutov;O. Aktsipetrov
摘要。研究了磁性纳米结构的二次谐波产生过程中光干涉在磁化诱导效应中的作用。磁化诱导效应的程度由精细结构参数决定，因此在低阶磁化率下磁化诱导效应较小，而在高阶磁化率下磁化诱导效应增强。非磁性和磁化非线性极化所产生的二次谐波远场区域的光干涉是增强磁致SHG强度的机制之一。考虑了非中心对称介质中谐振和非谐振条件下的干涉模型。该模型用于解释Co纳米晶和Gd单层磁化诱导SHG研究的实验结果。
Abstract. The role of optical interference in magnetization-induced effects in second-harmonic generation (SHG) is studied for magnetic nanostructures. The degree of magnetization-induced effects is governed by the fine-structure parameter and is subsequently small in low-order susceptibilities, yet enhanced at higher orders. One of the mechanisms of the enhancement of magnetization-induced contributions to the SHG intensity is related to the optical interference in the far-field region of the second-harmonic fields generated by nonmagnetic and magnetization-induced nonlinear polarizations. The model of interference is considered for resonant and off-resonant conditions in non-centro-symmetric media. This model is used for interpretation of experimental results of magnetization-induced SHG studies of Co nanocrystals and Gd monolayers.