Silver/Polystyrene Coated Hollow Glass Waveguides for the Transmission of THz Radiation
15 October 2007
We have applied techniques developed for infrared (IR) waveguides to fabricate silver (Ag)/polystyrene (PS) coated hollow glass waveguides (HGWs) for transmission of THz radiation. A loss of 0.95 dB/m at 119 µm (2.5 THz) was obtained for a 2-mm bore, 90-cm long Ag/PS HGW. We found that TE modes are supported in HGWs with thin PS films while hybrid (HE) modes dominate when PS film thickness increases. The lowest losses are obtained for the thicker PS films and the propagation of the HE modes.