Determination of magneto-optical characteristics of hexaferrites from 200 GHz to 1THz using time domain spectroscopy

Ranxi Zhang; Bin Yang; Yan Zhang; Robert S. Donnan

doi:10.1117/12.839690

20 November 2009 Determination of magneto-optical characteristics of hexaferrites from 200 GHz to 1THz using time domain spectroscopy

Ranxi Zhang, Bin Yang, Yan Zhang, Robert S. Donnan

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Proceedings Volume 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 751107 (2009) https://doi.org/10.1117/12.839690
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

Gyrotropic, magnetically-hard hexaferrite materials, are very promising candidates to operate as quasi-optical nonreciprocal devices at high frequencies (> 90GHz), with the consequent advantage of obviating the need for requiring extra biasing magnets and avoiding low temperature demagnetization. In this paper, a THz TDS system is used to make measurements on a thin (2.02 mm thickness) hexaferrite plate for both parallel and perpendicular polarisation of the pump beam. From these data, the intrinsic circular-polarisation transmittances of both senses of polarisation are computed and these are analysed to determine the magneto-optical constants of the hexaferrite plate over the range of 200 GHz to 1THz.

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Ranxi Zhang, Bin Yang, Yan Zhang, and Robert S. Donnan "Determination of magneto-optical characteristics of hexaferrites from 200 GHz to 1THz using time domain spectroscopy", Proc. SPIE 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 751107 (20 November 2009); https://doi.org/10.1117/12.839690

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KEYWORDS

Magnetism

Terahertz radiation

Refractive index

Dielectric polarization

Crystals

Dielectrics

Laser beam diagnostics

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