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Observation of faraday rotation induced in TGG by strong THz surface waves propagating along a wire

机译:沿导线传播的强太赫兹表面波在TGG中引起的法拉第旋转的观测

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Summary form only given. Thin metal wires are known to be a low loss and very low dispersion terahertz (THz) waveguide. Recently, generation of a strong THz surface wave was demonstrated by irradiating a wire surface with a ultrahigh intensity femtosecond laser [1]. Such THz light sources driven by femtosecond laser induced plasma are expected to have a high potential as a power scalable source. Picosecond magnetic field pulses from such strong THz sources are promising for advanced researches on magnetic and spintronic materials. In this study, for the first time, we demonstrated the magneto-optical (MO) sampling measurement of strong THz surface waves using a terbium gallium garnet (TGG) polycrystalline ceramic. We observed a strong Faraday rotation of 60 mrad at the maximum, but the time resolution was limited to a few tens of picoseconds due to the thick MO medium.
机译:仅提供摘要表格。众所周知,细金属线是一种低损耗和极低色散的太赫兹(THz)波导。近来,通过用超高强度飞秒激光照射金属丝表面证明了产生强太赫兹表面波[1]。飞秒激光诱导的等离子体驱动的这种太赫兹光源作为功率可扩展光源具有很高的潜力。来自如此强大的太赫兹源的皮秒磁场脉冲有望用于磁性和自旋电子材料的高级研究。在本研究中,我们首次展示了使用a镓石榴石(TGG)多晶陶瓷对强太赫兹表面波进行磁光(MO)采样测量的方法。我们观察到最大的法拉第旋转最大为60 mrad,但由于MO介质较厚,因此时间分辨率限制为几十皮秒。

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