这研究使用在 Al2O3 层嵌入使对称的表面电浆子电磁声子(SPP ) 激动的偶极子在 Au/Al2O3/Au 波导到的模式由使用有限差别的时间域(FDTD ) 调查它的侧面性质方法。激动的偶极子腐烂由于 100 nm 的薄 Al2O3 层的放射地直接的近地的联合到 SPP 模式。效果电并且磁场紧张侧面和腐烂长度被考虑了并且描绘。偶极子地点是一个重要因素在 Au/Al2O3/Au 波导影响对称的 SPP 模式的水平、垂直的侧面性质,这被发现。振幅电并且磁场紧张和 metal-insulatormetal (MIM ) 的波长 SPP 回声模式能被变化调节偶极子地点。水平、垂直的腐烂长度分别地是 19 和 24 nm。Au/Al2O3/Au 波导结构为设计 SPP 来源的实际应用是很有用的,这被期望。
This study uses a dipole embedded in A1203 layer to excite a symmetric surface plasmon polariton (SPP) mode in Au/A1203/Au waveguide to investigate its profile properties by using finite-difference time-domain (FDTD) method. The excited dipole decay radiatively direct near-field coupling to SPP mode owing to thin A1203 layer of 100 nm. The effects of electric and magnetic field intensity profiles and decay length have been considered and characterized. It is found that dipole location is an important factor to influence the horizontal and vertical profile properties of symmetric SPP mode in Au/A1203/Au waveguide. The amplitudes of electric and magnetic field intensity and the wavelengths of metal-insulatormetal (MIM) SPP resonance mode can be tuned by varying dipole location. The horizontal and vertical decay lengths are 19 and 24 nm, respectively. It is expected that the Au/A1203/Au waveguide structure is very useful for the practical applications of designing a SPP source.