zhang_lifeng_2009复旦年会摘要.doc

Optical response of strongly coupled metal nanoparticles L. F. Zhang and J. P. Huang Department of Physics, Fudan University, Shanghai 200433 abstract The optical responses of coupled metal nanoparticles are studied by using the image method of dipoles[1]. For two unequal nanoparticles, the small particles are revealed to have an evident shift of surface plasmon frequencies, which depend on the mutual interaction between the two particles. Our results exhibit that the plasmon resonant frequency of a small particle can be readily tuned by using a big particle nearby, due to the relatively strong electromagnetic coupling. Reference: [1]Y. Ju and J. P. Huang, The Journal of Physical Chemistry B, 112, 7865(2008)