Abstract
We point out an important fundamental limitation associated with the dielectric ribbon waveguide described by Yeh et al. [Appl. Opt. 44, 5937 (2005)], which would restrict its practical use in ultrahigh- or terahertz-speed guided-wave applications, contrary to their underlying prediction, and we additionally point out a noteworthy inaccuracy in their introductory discussion.
© 2008 Optical Society of America
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