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arXiv 1609.07883physics.optics
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有源磁等离子体结构中的横向磁光克尔效应

Transverse Magneto-Optical Kerr Effect in Active Magneto-Plasmonic Structures

Olga Borovkova, Andrey Kalish, Vladimir Belotelov

摘要:

提出了一种利用有源介质层增强磁等离子体纳米结构中横向磁光克尔效应的新方法。我们报告的理论分析的磁等离子体结构与铁磁介质掺杂稀土离子(Nd 3+)作为一个例子的增益层。增强发生在纳米结构的表面等离子体激元(SPP)共振附近。掺杂物在SPP波场中的受激发射部分补偿了SPP波的损耗。结果表明,由于SPP阻尼的减少,MP谐振的Q因子增加,TMOKE与被动纳米结构相比增加。

英文摘要:

We propose a novel method to enhance the transverse magneto-optical Kerr effect (TMOKE) in the magneto-plasmonic (MP) nanostructures by means of the active dielectric layer. We report the theoretical analysis of the magnetoplasmonic structure with a ferromagnetic dielectric doped with rear-earth ions (Nd3+) as the example of a gain layer. The enhancement takes place near the surface plasmon polariton (SPP) resonances of the nanostructures. The stimulated emission of the dopants in the field of SPP wave partially compensates its losses. It is shown that due to a decrease of SPP damping a Q-factor of the MP resonance increases and the TMOKE is increased in comparison with the passive nanostructure.

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