Metal disc-type splitter with radially placed gratings for terahertz surface waves

Metal disc-type splitter with radially placed gratings for terahertz surface waves

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A novel way to split terahertz (THz) surface waves is presented on the basis of propagation characteristics of spoof surface plasmon polaritons. Metal disc-type splitters with a centre hole and radially placed gratings are proposed and analysed using the finite-difference time-domain (FDTD) method in cylindrical co-ordinates. Numerical results demonstrate that the discs act as bi- and multi-directional THz surface wave splitters with large coupling regions, the frequency of which is selected by grating structures.


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      • 4. Zhou, Y.J., Cui, T.J.: ‘Multidirectional surface-wave splitters’, Appl. Phys. Lett., 2011, 98, (22), pp. 221901-1-3.
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      • 8. Fujita, K., Odajima, W.: ‘FDTD simulations of THz spoof surface plasmon in metallic grating structures’, IEICE Tech. Rep., 2013, EST2013-5, pp. 2126 (in Japanese).
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