Dual band terahertz waveguiding on a planar metal surface patterned with annular holes

C. R. Williams, M. Misra, S. R. Andrews, S. A. Maier, S. Carretero-Palacios, S. G. Rodrigo, F. J. Garcia-Vidal, L. Martin-Moreno

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We report studies of the guiding of terahertz radiation on a copper surface textured with an array of blind annular holes. The structure supports two tightly bound surface plasmon-polaritonlike electromagnetic waves associated with TE11 and TEM coaxial waveguide modes. The TE11 -like surface mode has a cutoff determined by the array period while the TEM mode can be arranged to have a lower frequency cut-off by adjusting the hole depth. The ability to guide two modes in independently variable bands could be useful in quantitative chemical sensing.

Original languageEnglish
Article number011101
Number of pages3
JournalApplied Physics Letters
Issue number1
Publication statusPublished - Jan 2010
Externally publishedYes

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