25 March 2005 Hollow CU-coated plastic waveguides for the delivery of THz radiation
Author Affiliations +
Terahertz (THz) radiation has important applications in spectroscopy, imaging, and space science. For some of these applications, in particular spectroscopy, a flexible fiber optic could potentially simplify the THz system and enable the user to transmit radiation to remote locations without excessive absorption by atmospheric moisture. To date THz fiber optics and waveguides have been limited to rigid hollow metallic waveguides, solid wires, or short lengths of solid-core transparent dielectrics such as sapphire and plastic. In this paper we report on flexible, hollow polycarbonate waveguides with interior Cu coatings for broadband THz transmission fabricated using simple liquid-phase chemistry techniques. The losses for these hollow-core guides were measured using a tunable, cw single-mode far IR laser. The losses for the best guides were found to be less than four dB/m and the single mode of the laser was preserved for the smaller bore waveguides. Loss calculations of the loss for the HE11 mode reveal that the metal-coated hollow waveguides have much higher loss than for waveguides coated with both metallic and dielectric thin films.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James A. Harrington, Pal Pedersen, Bradley F. Bowden, Andrew Gmitter, Eric Mueller, "Hollow CU-coated plastic waveguides for the delivery of THz radiation", Proc. SPIE 5727, Terahertz and Gigahertz Electronics and Photonics IV, (25 March 2005); doi: 10.1117/12.597300; https://doi.org/10.1117/12.597300

Back to Top