| 电子激励表面等离极化激元的粒子模拟 |
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| 引用本文： | 刘腊群,张平,王辉辉.电子激励表面等离极化激元的粒子模拟[J].强激光与粒子束,2018,30(4):043101-1-043101-4. |
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| 作者姓名： | 刘腊群 张平 王辉辉 |
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| 作者单位： | 电子科技大学 物理电子学院, 成都 610054 |
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| 基金项目： | 国家自然科学基金项目11705024国家自然科学基金项目61501094 |
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| 摘 要： | 采用极化电流微分方程，对贵金属中自由电子与外电场的共振过程进行描述。将该微分方程与麦克斯韦方程相结合，运用时域有限差分(FDTD)方法，在粒子PIC模拟软件CHIPIC3D的基础上，实现了电子激励表面等离极化激元(SPPs)的模拟。通过对100 keV电子平行于银薄膜表面运动、激励起表面等离极化激元的模拟，观测并分析了SPPs的场强及模式在银薄膜表面的分布，并验证了模拟结果的正确性。
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| 关 键 词： | 贵金属 时域有限差分法 粒子模拟 电子 表面等离极化激元 |
| 收稿时间： | 2017-10-12 |
Particle-in-cell simulation of electron-excited surface plasmon polaritons |
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| Institution: | School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | The resonance process of free electrons and external electric fields in noble metal (Ag) is described by using the polarization current difference equation. The difference equation is combined with the Maxwell equation. The finite-difference time-domain (FDTD) method is used. Based on the particle-in-cell (PIC) simulation software CHIPIC3D, the PIC simulation of the electron-excited surface plasmon polaritons (SPPs) is realized. Through simulating the SPPs excited by 100 keV electrons moving parallel to the surface of silver films, the field strength and mode of SPPs are observed and analyzed, and the simulation results are verified. |
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