Multilayered metal core-shell nanostructures for inducing a large and tunable local optical field
Multilayered metal core-shell nanostructures for inducing a large and tunable local optical field
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DOI：
10.1103/physrevb.72.073405
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发表时间：
2005-08
影响因子：
3.7
通讯作者：
Hongxing Xu
中科院分区：
文献类型：
--
作者：
Hongxing Xu
通过扩展Mie理论，我们研究了多层金属核壳球体纳米结构的近场光学性质，并证明了通过添加新的金属壳层可以增加局域场增强。在银核和最内层银壳之间的空腔中，可以获得超过10(5)倍的局部强度增强，以保证多层银核壳球体的适当构型。通过改变核壳纳米结构的构型，可以将高增强从红外区调谐到红外区。
We examine the near-field optical properties of multilayered metal core-shell sphere nanostructures by extending the Mie theory, and demonstrate that the local-field enhancement can be increased by adding new metal shells. A local intensity enhancement of more than 10(5) times can be obtained in the cavity between the Ag core and the innermost Ag shell for proper configurations of multilayered Ag core-shell spheres. The high enhancement can be tuned from the red to the infrared region by varying the configurations of the core-shell nanostructures.