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| 近场聚焦的纳米散射结构研究 |
| Near-field focused nano-scattering structure |
| 投稿时间：2018-12-14 |
| DOI：10.3969/j.issn.1005-5630.2019.05.007 |
| 中文关键词: 线偏振光 固态浸没透镜 米氏散射 聚焦 FDTD |
| 英文关键词:linearly polarized light solid immersion lens Mie scattering focusing FDTD |
| 基金项目:国家重点基础研究发展计划（973计划）（2015CB352001）；上海市科学技术委员会科研项目（15140502600） |
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| 中文摘要: |
| 为克服以近似理论分析为主的米氏散射方法在研究微粒粒径小于入射光波长情况下带来的局限性，采用了基于数值化模拟的有限时域差分（FDTD）方法对纳米级散射体微粒在近场聚焦光束下发生的聚焦作用进行仿真研究。以聚焦的线偏振光为光源，并将球形纳米空气粒子嵌入固态浸没透镜底面光束聚焦点位置，使用FDTD仿真软件模拟了纳米空气粒子附近的光强分布信息。通过改变相应的仿真条件，选出最合适的纳米散射结构参数，实现了良好的聚焦成像效果。 |
| 英文摘要: |
| In order to overcome the limitations of the Mie scattering method based on approximate theoretical analysis in the study of particle size smaller than the incident light wavelength, this paper used the finite difference time domain (FDTD) method based on numerical simulation to scatter nano-scale. The effect of bulk particles on the near-field focused beam was simulated. The FDTD simulation software was used to simulate the light intensity distribution information around the nano-air particles with the focused linearly polarized light as the light source and the spherical nano-air particles embedded in the beam focus point of the bottom surface of the solid immersion lens. A good focus imaging effect is achieved by changing the corresponding simulation conditions. |
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