Numerical Study on the Dynamic Control of Surface Plasmon polaritons by Adjusting the Phase of Multiple Incident Beams

• Main Authors: Chun-FuKuo, 郭峻甫
• Other Authors: Shu-Chun Chu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/zzj8p7

博士 === 國立成功大學 === 物理學系 === 106 === This study proposes new methods to dynamically control the excitation of surface plasmon polaritons (SPPs) by modifying the phase of multiple incident beams with simple structures. All the proposed methods are verified by theoretical analyses and numerical simulations using finite-difference time-domain (FDTD) method. There are three parts in this study. The first part is excitation of SPPs with tunable directions and intensity ratios by phase control of dual fundamental Gaussian beams (i.e. TEM0,0). The results show that we can control the intensity ratios from 0.069 to 14 for single-slit case and from 0.0087 to 115 for double-slit case. The second part is excitation of different SPP interference patterns and high spatial density SPP vortex array by phase control of dual first order Hermite Gaussian beams (i.e. TEM0,1 or TEM1,0). The results show that the period of the SPP vortex array had only half SPP wavelength. The third part is dynamically controlling the interference pattern of SPPs by phase control of quad fundamental Gaussian beams and its application to particle manipulation. The results show that we can simultaneously manipulate multi-particle moving the same path.