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摘要
We report a numerical study of plasmonic waveguides that localize light in two dimensions at a cross section of 4.2 nm x 2.1 nm with the propagation length of 38 mu m. By varying the geometrical parameters, strong mode confinements (range from lambda(2)/3352 to lambda(2)/2557525) are achieved with controllable propagation distance (44.68-40.988 mu m), and mode size below 1 nm(2) has been demonstrated for the first time. Furthermore, a cross-index-modulation mechanism is proposed to explain the strong field localization behavior, providing guidelines for future waveguide designs.
- 出版日期2012-7-15
- 单位浙江大学
