Characterization of Silver Nanowire Layers in the Terahertz Frequency Range

Abstract

Thin layers of silver nanowires are commonly studied for transparent electronics. However, reports of their terahertz (THz) properties are scarce. Here, we present the electrical and optical properties of thin silver nanowire layers with increasing densities at THz frequencies. We demonstrate that the absorbance, transmittance and reflectance of the metal nanowire layers in the frequency range of 0.2 THz to 1.3 THz is non-monotonic and depends on the nanowire dimensions and filling factor. We also present and validate a theoretical approach describing well the experimental results and allowing the fitting of the THz response of the nanowire layers by a Drude–Smith model of conductivity. Our results pave the way toward the application of silver nanowires as a prospective material for transparent and conductive coatings, and printable antennas operating in the terahertz range—significant for future wireless communication devices.

Investigation on the Correlation between Dispersion Characteristics at Terahertz Range and Dielectric Permittivity at Low Frequency of Epoxy Resin Nanocomposites

“…The coherent detection mode of the terahertz time-domain spectroscopy (THz-TDS) makes it convenient to obtain the dispersion characteristics of testing materials at the terahertz range [21][22][23][24][25]. The investigation of the dispersion characteristics of nanocomposites is beneficial to the exploiting of fundamental theory in nanocomposites [26][27][28][29][30].…”