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We perform time-domain terahertz (THz) spectroscopy measurement to study the complex conductivity of layered FeOCl with and without surface noble metal adsorption. A weak THz transmission intensity is obtained in pristine layered FeOCl and the transmission coefficient comparable increases with the introduction of surface noble metal nanoparticle adsorption. The frequency-resolved complex conductivity of FeOCl samples with and without noble metal nanoparticle adsorption is further obtained from measured THz transmission intensity. Using the classical Drude-Smith model, we find significant increase of carrier density and decrease of carrier-carrier scattering time with surface noble metal nanoparticle adsorption. These results provide a possible way to improve the conductivity of layered FeOCl material for its potential applications in the field of two-dimensional electronics.

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Optical Properties of FeOCl Decorated by AuAg Alloy Nanoparticles Were Studied with Terahertz Time-Domain Spectroscopy

  • 会议论文

  • 发表日期：

    2025年

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  • Shuang Sun,
  • Xinke Wang,
  • Peng Han,
  • Wenfeng Sun,
  • Jiasheng Ye,
  • Zehao He,
  • Shengfei Feng,
  • Yan Zhang

摘要

We perform time-domain terahertz (THz) spectroscopy measurement to study the complex conductivity of layered FeOCl with and without surface noble metal adsorption. A weak THz transmission intensity is obtained in pristine layered FeOCl and the transmission coefficient comparable increases with the introduction of surface noble metal nanoparticle adsorption. The frequency-resolved complex conductivity of FeOCl samples with and without noble metal nanoparticle adsorption is further obtained from measured THz transmission intensity. Using the classical Drude-Smith model, we find significant increase of carrier density and decrease of carrier-carrier scattering time with surface noble metal nanoparticle adsorption. These results provide a possible way to improve the conductivity of layered FeOCl material for its potential applications in the field of two-dimensional electronics.