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Handbook of Terahertz Technology for Imaging, Sensing and Communications by D Saeedkia

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3

Fundamental aspects of surface plasmon polaritons at terahertz frequencies

J. Gómez Rivas,     AMOLF Eindhoven University of Technology, The Netherlands

Y. Zhang and A. Berrier,     AMOLF, The Netherlands

Abstract:

We present in this chapter an introduction to the field of terahertz (THz) plasmonics. The characteristics of surface plasmon polaritons (SPPs) are determined by the complex permittivity of conductors. Therefore, we introduce the Drude model to describe the permittivity of conductors at THz frequencies. The large absolute value of the permittivity of metals leads to a weaker confinement of SPPs in these materials compared to semiconductors. We illustrate the characteristic lengths of SPPs on flat surfaces by calculating them ...

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