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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CC_P_12

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

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Abstract

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.

© 2017 IEEE

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