4 August 2009 Terahertz spectroscopy of sub-wavelength size metallic particles
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The terahertz wave transmission through ensembles of sub-wavelength size metallic particles is studied by THz-TDS and finite different time domain (FDTD). The result of the experiment shows that with the increase of the thickness of the sample, the terahertz pulses experience significant attenuation, delay and broadening. In addition, an obvious red-shift and narrowing of the amplitude spectrum are observed. Numerical simulations based on FDTD are performed to explain the details of the data and lead to an excellent agreement with the experimental results. Furthermore, the relation between the size of the particles and the transmission properties of terahertz radiation is analyzed.
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Zhen-wei Zhang, Zhen-wei Zhang, Yu-ping Yang, Yu-ping Yang, Zhi-yi Liu, Zhi-yi Liu, Yan Zhang, Yan Zhang, Cun-lin Zhang, Cun-lin Zhang, } "Terahertz spectroscopy of sub-wavelength size metallic particles", Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73852A (4 August 2009); doi: 10.1117/12.836551; https://doi.org/10.1117/12.836551

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