Zhao Ke, Xu Hongxing, Gu Baohua, Zhang Zhenyu
Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN 37996, USA.
J Chem Phys. 2006 Aug 28;125(8):081102. doi: 10.1063/1.2229204.
The optical properties of one-dimensional arrays of metal nanoshell dimers are studied systematically using the T-matrix method based on Mie theory, within the context of surface enhanced Raman scattering (SERS). It is shown that the local electromagnetic enhancement can be as high as approximately 4.5 x 10(13) for nanoshell dimer arrays with optimal geometry, and sensitive tunability in the resonant frequency can be gained by varying the geometrical parameters, making such structures appealing templates for SERS measurements with single molecule sensitivity. The extraordinarily high enhancement is attributed to a collective photonic effect constructively superposed onto the intrinsic enhancement associated with an isolated nanoshell dimer.
在表面增强拉曼散射（SERS）的背景下，基于米氏理论采用T矩阵方法系统地研究了金属纳米壳二聚体一维阵列的光学性质。结果表明，对于具有最佳几何结构的纳米壳二聚体阵列，局部电磁增强可高达约4.5×10¹³，并且通过改变几何参数可以在共振频率上获得灵敏的可调性，这使得此类结构成为具有单分子灵敏度的SERS测量的有吸引力的模板。这种极高的增强归因于一种集体光子效应，它与孤立纳米壳二聚体相关的固有增强相叠加。
