发布时间：

2025-04-30

论文名称：

Refractive index sensitivity of gold double concentric nanoshells: Tuning the intensity discrepancy of two-band plasmonic absorption

发表刊物：

Sensors and Actuators B

摘要：

Refractive index sensitivity of gold double concentric nanoshells based on plasmonic absorption intensity has been investigated by using the quasistatic calculation. Increasing the environmental dielectric constant leads to the absorption intensity of vertical bar omega(-)(-)> mode gets intense, whereas the absorption intensity of vertical bar omega(+>)(-) mode fades down. Thus the intensity discrepancy between the two-band plasmonic absorption is greatly dependent on the environmental dielectric constant, which could be used in the refractive index sensing. Furthermore, the sensing ability can be improved by decreasing the thickness of the inner gold shell or increasing the thickness of the outer gold shell. A mechanism based on inter-shell plasmonic coupling and local electric field dependent surface charge density was investigated to illuminate the different effects from inner and outer gold shell on the refractive index sensitivity. (c) 2011 Elsevier B.V. All rights reserved.

合写作者：

Jian Zhu, Ying-juan Ren, Shu-min Zhao

是否译文：

否

发表时间：

2012-01-03