Image theory for plasmon-modified luminescence near nanospheres

Zhe Zhang; Derrick Lim; Rodolfo E. Diaz

doi:10.1117/12.2004164

22 February 2013 Image theory for plasmon-modified luminescence near nanospheres

Zhe Zhang, Derrick Lim, Rodolfo E. Diaz

Proceedings Volume 8595, Colloidal Nanocrystals for Biomedical Applications VIII; 859508 (2013) https://doi.org/10.1117/12.2004164
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

We present a quasi-static model of the electromagnetic interaction between dipolar emitting molecule and a Plasmon-metal nano-sphere. Based on the image theory of dielectric sphere, we model the Plasmon nano-spheres by off-centered dipole images. The retardation effect is taken into account by electrodynamical modifications on spherical polarizability and dipole radiation field. The modifications of the radiative rate, total decay rate and the quantum yield for the molecules are derived. The image model indicates the strong distance dependence of the enhancement on both radiative and total decay rates. The comparison with the exact electrodynamical model and other simplified models indicate that the off-center image provide accurate predictions on radiative and total decay rates, even in close distances.

Citation Download Citation

Zhe Zhang, Derrick Lim, and Rodolfo E. Diaz "Image theory for plasmon-modified luminescence near nanospheres", Proc. SPIE 8595, Colloidal Nanocrystals for Biomedical Applications VIII, 859508 (22 February 2013); https://doi.org/10.1117/12.2004164

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