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Surface Plasmon Resonance and Field Enhancement of Au/Ag Alloyed Hollow Nanoshells |
| ZHOU Li;YU Xue-Feng;FU Xiao-Feng;HAO Zhong-Hua;LI Kai-Yang |
| Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Department of Physics, Wuhan University, Wuhan 430072 |
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ZHOU Li, YU Xue-Feng, FU Xiao-Feng et al 2008 Chin. Phys. Lett. 25 1776-1779 |
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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, and
the 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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Received: 13 October 2007
Published: 29 April 2008
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| PACS: |
61.46.Df
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(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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78.67.Bf
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(Nanocrystals, nanoparticles, and nanoclusters)
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