Far-infrared conductivity of CuS nanoparticles measured by terahertz time-domain spectroscopy

• 作 者: 杨玉平 张振伟 施宇蕾 冯帅 王文忠
• 机 构: School of Science,Minzu University of China,Department of Physics,Capital Normal University,
• 出 处: Chinese Physics B
• 发表日期: 2010年04期
• 关键词: terahertz localized imaginary interfaces applying behaviour dielectric metallic

This paper reports that terahertz time-domain spectroscopy is used to measure the optical properties of CuS nanoparticles in composite samples.The complex conductivity of pure CuS nanoparticles is extracted by applying the Bruggeman effective medium theory.The experimental data are consistent with the Drude-Smith model of conductivity in the range of 0.2-1.5 THz.The results demonstrate that carriers become localized with a backscattering behaviour in small-size nanostructures.In addition,the time constant for the carrier scattering is obtained and is only 64.3 fs due to increased electron interaction with interfaces and grain boundaries.

This paper reports that terahertz time-domain spectroscopy is used to measure the optical properties of CuS nanoparticles in composite samples. The complex conductivity of pure CuS nanoparticles is extracted by applying the Bruggeman effective medium theory. The experimental data are consistent with the Drude-Smith model of conductivity in the range of 0.2-1.5 THz. The results demonstrate that carriers became localized with a backscattering behavior in small-size nanostructures. addition, the time constant for the carrier scattering is obtained and is only 64.3 fs due to increased electron interaction with interfaces and grain boundaries.