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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51935

Title: Plasmonic effects in composite metal nanostructures for sensing applications
Authors: Yuan-Fong Chou Chau
Chung-Ting Chou Chao
Hai-Pang Chiang
Chee Ming Lim
Nyuk Yoong Voo
Abdul Hanif Mahadi
Contributors: 國立臺灣海洋大學光電科學研究所
Keywords: Composite metal nanostructures
Plasmonic sensor
Metal nanoparticles
Modeling and simulation
Date: 2018-07
Issue Date: 2019-01-08T01:33:09Z
Publisher: J Nanopart. Res.
Abstract: Abstract: We have investigated numerically the plasmonic effect on a two-dimensional periodic array of metallic nanostructures. The unit cell of the array has an Ag nanosphere and nanorod pair formed in a single structure. Three-dimensional finite element method is used for the study on the sensing performance within the optical spectra. The study takes into account the influences of the structural and material parameters, the rotational angle of the metal nanostructure, the number of metal nanostructure per unit cell, and the localized surface plasmon resonances. The proposed nanostructures function as a refractive index sensor with a sensitivity of 400 nm/RIU (RIU is the refractive index unit), showing the characteristics of low transmittance (T = 3.90%), high absorptance (A = 94.5%), and near-zero reflectance (R = 0.15%), could be achieved by a triangular arrangement of nanostructures within a unit cell. We also show how the tailoring of the structural parameters relates to the specific sensing schematics of the sensor.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51935
Appears in Collections:[光電科學研究所] 期刊論文

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