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

Reference:

Williams, C., Misra, M., Andrews, S. R., Maier, S. A., Carretero-Palacios, S., Rodrigo, S. G., Garcia-Vidal, F. J. and Martin-Moreno, L., 2010. Dual band terahertz waveguiding on a planar metal surface patterned with annular holes. Applied Physics Letters, 96 (1), 011101.

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Official URL:

http://dx.doi.org/10.1063/1.3276545

Abstract

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.

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