Polarization to the field enhancement by a gold dimer

Xin Hong; Zheng Jin

doi:10.1117/12.2244498

3 November 2016 Polarization to the field enhancement by a gold dimer

Xin Hong, Zheng Jin

Proceedings Volume 10028, Plasmonics II; 1002814 (2016) https://doi.org/10.1117/12.2244498
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

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 ~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.

Citation Download Citation

Xin Hong and Zheng Jin "Polarization to the field enhancement by a gold dimer", Proc. SPIE 10028, Plasmonics II, 1002814 (3 November 2016); https://doi.org/10.1117/12.2244498

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