Kurosawa Hiroyuki, Ishihara Teruya
Department of Physics, Tohoku University, Sendai, Japan.
Opt Express. 2012 Jan 16;20(2):1561-74. doi: 10.1364/OE.20.001561.
We have experimentally and numerically investigated photo-induced voltage (PIV) effect across a Au film with a dielectric grating. We observed strongly enhanced voltage when surface plasmon polariton (SPP) is excited. It was found that electrons in the Au film are driven to the propagation direction of SPP. We have numerically shown that dissipative force called as scattering force well elucidates the experimental result for the first time. It is also clarified that this effect can be attributed to the momentum transfer from SPP to free carriers in the Au film. Thus the effect we observed can be called as surface plasmon drag effect in analogy with the photon drag effect.
我们通过实验和数值模拟研究了带有介质光栅的金膜上的光致电压（PIV）效应。当表面等离激元极化激元（SPP）被激发时，我们观察到电压显著增强。结果发现，金膜中的电子被驱动到SPP的传播方向。我们通过数值模拟首次表明，一种被称为散射力的耗散力能够很好地解释实验结果。同时也阐明了这种效应可归因于从SPP到金膜中自由载流子的动量转移。因此，我们观察到的这种效应类似于光子拖曳效应，可被称为表面等离激元拖曳效应。
