Research on surface waves supported by metals at THz frequencies is experiencing a tremendous growth due to their potential for imaging, biological sensing and high-speed electronic circuits. Harnessing their properties is, however, challenging because these waves are typically poorly confined and weakly bound to the metal surface. Many design strategies… (More)
Due to a technical error, the original Article contained errors in the numbering of several papers in the reference list and two references were omitted. This has now been corrected in the Article.