The development of SPP-based terahertz waveguides has demonstrated being of great potential to achieve an appropriate trade-off between losses and dispersion, particularly for sensing and imaging operations at that spectral band. In this work, we implement a microstructured fiber comprising an air core surrounded by an array of silver rods and air holes. With our geometry, we can reach losses of 0.01 cm-1 and dispersion nearly zero for a broad range of the terahertz region. Our goal is to demonstrate that we can optimize those waveguide structures to improve their properties at terahertz band.
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