Abstract-Metallic and 3D-printed dielectric helical terahertz waveguides

Dominik Walter Vogt, Jessienta Anthony, and Rainer Leonhardt

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-26-33359

We investigate guidance of Terahertz (THz) radiation in metallic and 3D-printed dielectric helical waveguides in the frequency range from 0.2 to 1 THz. Our experimental results obtained from THz time-domain spectroscopy (THz-TDS) measurements are in very good agreement with finite-difference time-domain (FDTD) simulations. We observe single-mode, low loss and low dispersive propagation of THz radiation in metallic helical waveguides over a broad bandwidth. The 3D-printed dielectric helical waveguides have substantially extended the bandwidth of a low loss dielectric tube waveguide as observed from the experimental and simulation results. The high flexibility of the helical design allows an easy incorporation into bench top THz devices.

© 2015 Optical Society of America

Full Article  |  PDF Article

Abstract-Terahertz pulse propagation in 3D-printed waveguide with metal wires component

Nurfina Yudasari, Jessienta Anthony, and Rainer Leonhardt  »View Author Affiliations

http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-22-21-26042

Optics Express, Vol. 22, Issue 21, pp. 26042-26054 (2014)
http://dx.doi.org/10.1364/OE.22.026042

Abstract: We report on the characterization of 3D-printed hollow core Terahertz waveguides with metal wire inclusions over a frequency range of 0.2-1.0 THz using standard THz time-domain spectroscopy. We observe single-mode broadband THz propagation in these waveguides, and measure the loss coefficient and the mode effective phase index. Our measurement data agree well with predicted values obtained from numerical simulations.

© 2014 Optical Society of America