Controlling Terahertz Surface Plasmon Properties on a Periodically Structured Silicon Surface

Figure 5

(a) Numerically examined frequency domain spectra for three patterned substrates with different periodicity in the -direction, however constant periodicity in the -direction; that is, “” = 400 µm. The other parameters are “” = 200 µm, “” = 200 µm, and “” = 100 µm. (b) Frequency domain spectra for three patterned substrates with same = 400 µm, however different values of . The other parameters are same as those in (a). (c) It shows the variation of antiresonant frequency with length and width of the vertical structures. The calculated values are fitted with straight lines. (d) shows a comparison of the transverse confinement between 1D and 2D structured samples.

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