27 February 2012 Propagation loss optimization in metal/dielectric coated hollow flexible terahertz waveguides
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Proceedings Volume 8261, Terahertz Technology and Applications V; 82610P (2012) https://doi.org/10.1117/12.906833
Event: SPIE OPTO, 2012, San Francisco, California, United States
Abstract
Low-loss hollow flexible metal/dielectric coated polycarbonate waveguides have been designed and fabricated for the maximal transmission of Terahertz radiation (THz). Attenuation characteristics of Terahertz radiation in Ag/Au coated waveguides with bore diameters 4.1 mm, 3.2 mm, 2 mm were studied at 215 µm wavelength and the maximal transmission was obtained by coupling the lowest loss TE11 mode from an optically pumped terahertz laser. Transmission loss can be reduced substantially by adding a dielectric layer to the metal coated waveguide and by coupling HE11 mode into it. Polystyrene (PS) was chosen to be the dielectric, due to its low extinction coefficient, which enhances the transmission through the waveguide. A propagation loss of less than 1 dB/m was achieved with these metal/dielectric coated waveguides.
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Pallavi Doradla, Cecil S. Joseph, Jayant Kumar, Robert H. Giles, "Propagation loss optimization in metal/dielectric coated hollow flexible terahertz waveguides", Proc. SPIE 8261, Terahertz Technology and Applications V, 82610P (27 February 2012); doi: 10.1117/12.906833; https://doi.org/10.1117/12.906833
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