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Indexed by:会议论文

Date of Publication:2016-10-12

Included Journals:EI、CPCI-S

Volume:10028

Key Words:localized surface plasmon resonance; gold nanodimer; coupling; excitation light polarization direction; enhancement

Abstract:Due to the effect of plasmonic coupling, gold nanoparticle dimers have been paid more attentions in bio-imaging. The coupling effect existing at the gap between a closely linked particle pair can make the local field strongly enhanced and in which the angle between the excitation polarization and the dimer axis plays a dominant role. We calculated the amplitude distribution under a highly focused illumination objective. The simulation results show that for such a model, 45 degrees between the excitation polarization and the dimer axis can produce an optimum signal. The enhancement thus obtained is similar to 10.78 fold while the variation between peak-peak can reach 6.59 fold compared to a single plasmoic particle during the rotation of the polarization.