Optimization of silica–silver–gold layered nanoshell for large near-field enhancement

Wu, D. J.; Liu, X. J.
April 2010
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p151912
Academic Journal
The near-field enhancement of silica–silver–gold (SSG) nanoshells has been investigated by using Mie theory. If the thickness of Au shell is smaller than 5 nm, the maximum of near-field for SSG increases first and then decreases with increasing Ag layer thickness. Thus, the near-field for SSG can be modified by Ag layer and can possess more excellent near-field enhancement. If the thickness of Au shell is larger than 10 nm, the maximum of near-field of SSG nanoshell decreases with increasing Ag layer thickness. We further discuss the influence of Au shell thickness on the near-field of SSG nanoshell.


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