We present an experimental study of several common perturbations of wire waveguides for terahertz pulses. Sommerfeld waves retain significant signal strength and bandwidth even with large gaps in the wire, exhibiting more efficient recoupling at higher frequencies. We also describe a detailed study of bending losses. For a given turn angle, we observe an optimum radius of curvature that minimizes the overall propagation loss. These results emphasize the impact of the distortion of the spatial mode on the radiative bend loss.
© 2010 Optical Society of America
Original Manuscript: October 27, 2009
Revised Manuscript: December 22, 2009
Manuscript Accepted: January 7, 2010
Published: February 11, 2010
Victoria Astley, Julianna Scheiman, Rajind Mendis, and Daniel M. Mittleman, "Bending and coupling losses in terahertz wire waveguides," Opt. Lett. 35, 553-555 (2010)