Investigation of Plasmon Resonances of Ag Nanoshells for Sensing Applications

Abstract:

Sensing with metal nanostructures is one of the most promising applications of nanoplasmonic devices. This paper demonstrated the theoretical simulation studies on the localized surface plasmon (LSP) of Ag nanoshells with a core diameter of 20 nm and 50 nm. The refractive index-sensing properties, such as sensitive band locations of the Ag nanoshells and sensitive spectral features as a function of nanoshell thickness, are investigated. It is found that the thicker Ag nanoshells show higher sensitivity, but the higher-order LSP resonance modes and wide extinction spectra band degrade its response. The optimum thickness is concluded to be 10nm with a sensitivity of 370nm/RIU.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 1459-1462
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.1459
• Online since: February 2012
• Authors: Peng Fei Zhang, Pei Hong Cheng
• Keywords: Ag Nanoshell, Sensor, Surface Plasmon

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