Mode Properties of Flat-top Silver Nano-ridge Surface Plasmon Waveguides
| Autor: | Pan, Zeyu, Guo, Junpeng, Soref, Richard, Buchwald, Walter, Sun, Greg |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | JOSA B, Vol. 29, Issue 3, pp. 340-345 (2012) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/JOSAB.29.000340 |
| Popis: | We investigate surface plasmon modes supported by flat-top silver nano-ridges. We calculate the mode electromagnetic field distribution, the dispersion curve, the travel range, and the figure-of-merit of the nano-ridge mode. We find that the nano-ridge surface plasmon modes are quasi-TEM modes with longitudinal field components three orders of magnitude smaller than the transverse field components. The quasi-TEM nature of mode profiles reveals that the propagation of free electron oscillations on the top of the nano-ridge contributes mainly to the tightly confined ridge mode. We also find that as the width of the nano-ridge decreases, the ridge mode becomes more tightly confined on the ridge top. As the width of the nano-ridge increases, the nano-ridge mode approaches two decoupled right-angle wedge plasmon modes. Comment: 23 pages, 9 figures, journal article |
| Databáze: | arXiv |
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