Calculation of curvature dependent surface plasmon resonance in gold nanospheroid and nanoshell |
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Authors: | Jian Zhu |
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Institution: | (1) Institute of Modern Physics, School of Science, Xi’an Jiaotong University, Xi’an, 710049, Peoples Republic of China |
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Abstract: | In this paper, theoretical calculations based on dipole-limit are performed to investigate the effects of curvature on the
surface plasmon resonance (SPR) properties of nanometer size gold spheroid and shell. By comparing the aspect ratio with the
shell thickness, we demonstrated that the curvature radius is a common better factor that can be used to predict the SPR wavelength
and shift fashion. For nanospheroid, increasing the ratio of curvature radius corresponding to the climaxes leads to an increase
in the ratio of SPR wavelength, whereas increasing the ratio of curvature radius of outer and inner surface in nanoshell leads
to an decrease in the ratio of SPR wavelength. As a morphologic factor, curvature radius plays an important role in affecting
the distribution of electron density, and consequently controlling the SPR frequency. |
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Keywords: | Curvature Gold nanospheroid Gold nanoshell Surface plasmon resonance (SPR) Quasi-static Theory Simulation |
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