Terahertz Optical Properties of Oils for Signal Loss Reduction in Multilayer Structures

<p class="western">
<span lang="en-US">The study presents a comprehensive database of the
optical properties of 20 different plant-based, synthetic, and
mineral oils within the terahertz (THz) radiation range. The analysis
focused on the absorption coefficient and refractive index in the
frequency range of 100 GHz to 1.5 THz. The optical properties of the
oils were measured using terahertz time-domain spectroscopy (THz TDS)
with the TeraPulse Lx Modular System (TeraView) operating in
transmission mode with a dry-air chamber. </span>Additionally, the
database includes results from THz TDS measurements conducted in the
100 GHz to 2 THz range on a multilayer structure with three inlets.
These results demonstrate a reduction in signal loss associated with
undesired internal reflections within the multilayer structure when a
specifically selected synthetic oil was applied for the successive
filling of the inlets.</p>