利用离散偶极近似(Discrete dipole approximation,DDA)方法分析了入射光偏振状态对单个金纳米捧状颗粒的光学性质的影响,并给出了单个金纳米棒状颗粒底面和剖面的近场分布图,对于设计实现基于金属微纳结构的纳米光子器件具有一定的指导意义.研究结果表明,不同的入射光偏振方向会激发不同的表面等离子体模式(横向表面等离子体共振和纵向表面等离子体共振),这将影响棒状颗粒的消光谱峰和近场分布.
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