论文部分内容阅读
应用离散偶极子近似方法计算了空心方形银纳米结构的消光光谱及其近场电场分布,并与U形银纳米结构的计算结果进行了比较.结果发现,空心方形纳米结构和U形纳米结构具有不同的电子振动模式;在主共振峰波长入射时,空心方形纳米结构拥有更强的电场增强和更大面积的强电场分布.这些结果表明空心方形纳米结构更适合于作为表面增强拉曼散射的基底,并用于生物分子或者化学分子的探测.另外,可以通过改变空心方形纳米结构的边长和尺寸来调节其等离子体共振峰的位置,以满足其在表面增强拉曼散射等等离子体光子学方面的应用.
The extinction spectra and the near-field electric field distribution of the hollow square silver nanostructures were calculated by the discrete dipole approximation method and compared with that of the U-shaped silver nanostructures. The results showed that the hollow square nanostructures and the U-shaped nanostructures Have different modes of electron vibration.When the main resonance wavelength is incident, the hollow square nanostructures have stronger electric field enhancement and larger electric field distribution of larger area.These results show that the hollow square nanostructures are more suitable for surface-enhanced Raman scattering And used for the detection of biomolecules or chemical molecules.In addition, the position of the plasmon resonance can be adjusted by changing the side length and size of the hollow square nanostructures so as to satisfy the requirement of surface enhanced Raman scattering and other plasma photons The application of science.