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Sensing response of dielectric coated spherical metal nanoshells

PEIHONG CHENG1, HONGXIA ZHAO1, JINGRUI WANG1, LIGANG WU1, JILONG BAO1,*

Affiliation

  1. School of Electronic and Inf or mation Engineering, Ningbo University of Technolo g y, Ningbo, 315016 People s Republic of Chi na

Abstract

Localized surface plasmon properties of dielectric coated spherical metal nanoshells embedded in different surrounding environment were computed theoretically, and the effect of the dielectric coating on the sensing response of metal nanoshells was a nalyzed accordingly. It was found that the sensibility of the metal nanoshells depends on the thickness and refractive index of the coating layer . The sensitivity can be decreased from 257 nm/RIU to about 90nm/RIU after coated with 9 nm coating for [10, 15 ] nm Ag nanoshell. However, d ielectric Coating may improve the figure of merit of the sensing response of metal nanoshells with large size. The FOM of [30, 36] nm Ag nanoshell can be increased from 2.3 RIU-1 to about 2.8 RIU-1 ..

Keywords

Metal n anoshells, Surface p lasmon, Sensing r esponse.

Citation

PEIHONG CHENG, HONGXIA ZHAO, JINGRUI WANG, LIGANG WU, JILONG BAO, Sensing response of dielectric coated spherical metal nanoshells, Optoelectronics and Advanced Materials - Rapid Communications, 11, 5-6, May-June 2017, pp.312-316 (2017).

Submitted at: July 8, 2016

Accepted at: June 7, 2017