Surface Plasmon Resonance and Field Enhancement of Au/Ag Alloyed Hollow Nanoshells |
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| Authors: | ZHOU Li YU Xue-Feng FU Xiao-Feng HAO Zhong-Hua LI Kai-Yang |
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| Affiliation: | Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Department of Physics, Wuhan University, Wuhan 430072 |
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| Abstract: | We investigate the nanostructure, surface plasmon resonance (SPR) absorption and nonlinear enhancement of Au/Ag alloyed hollow nanoshells prepared by the replacement reaction of Ag nanoparticles in a HAuCl4 aqueous solution. As the volume of HAuCl4 increases from 0mL to 0.5mL, the SPR band of the Au/Ag alloyed nanoshells is tuned from 430nm to 780nm, andthe third-order nonlinear optical susceptibility is enhanced nearly by an order of magnitude, which indicates a large enhancement of local field in the Au/Ag alloyed hollow nanoshells with hole defects. |
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| Keywords: | 61.46.Df 73.20.Mf 78.67.Bf |
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