Femtosecond intrapulse evolution of the magneto-optic Kerr effect in magnetoplasmonic crystals

Femtosecond intrapulse evolution of the magneto-optic Kerr effect in magnetoplasmonic crystals
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磁等离子晶体中磁光克尔效应的飞秒脉冲内演化

DOI:
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
A. A. Fedyanin
A. A. Fedyanin
中科院分区:
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文献类型:
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作者:
M. Shcherbakov;P. Vabishchevich;A. Frolov;T. Dolgova;A. A. Fedyanin

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Samsung R&D Institute Russia,莫斯科,俄罗斯(日期:2014年7月23日)在磁等离子体学中,可以通过激发表面等离子体激元(SPP)来定制纳米结构的磁光特性。到目前为止,磁等离子体效应一直被认为是静态的。在这里,我们描述了超快磁等离子体的表现,通过观察的非平凡的演变的横向磁光克尔效应内的45 fs脉冲receivedfrom铁基磁等离子体晶体。这种现象发生在SPP共振激发时,在不同的共振斜率下表现出相反的时间导数符号,并可用SPP的磁化色散关系来解释。
Samsung R&D Institute Russia, Moscow, Russia(Dated: July 23, 2014)In magnetoplasmonics, it is possible to tailor the magneto-optical properties of nanostructuresby exciting surface plasmon polaritons (SPPs). Thus far, magnetoplasmonic effects have beenconsidered static. Here, we describe ultrafast manifestations of magnetoplasmonics by observingthe non-trivial evolution of the transverse magneto-optic Kerr effect within 45-fs pulses reflectedfrom an iron-based magnetoplasmonic crystal. The effect occurs for resonant SPP excitations,displays opposite time derivative signs for different slopes of the resonance, and is explained withthe magnetization-dependent dispersion relation of SPPs.