http://scholars.ntou.edu.tw/handle/123456789/1764
Title: | Fabrication and Characterization of a Metallic-Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application | Authors: | Yuan-Fong Chou Chau Kuan-Hung Chen Hai-Pang Chiang Chee Ming Lim Hung Ji Huang Chih-Hsien Lai N. T. R. N. Kumara |
Keywords: | periodic nanorod array;nanosphere lithography;reactive ion etching;finite element method;plasmonic sensor | Issue Date: | 26-Nov-2019 | Journal Volume: | 9 | Journal Issue: | 12 | Start page/Pages: | 1691 | Source: | Nanomaterials | Abstract: | In this paper, a periodic metallic–dielectric nanorod array which consists of Si nanorods coated with 30 nm Ag thin film set in a hexagonal configuration is fabricated and characterized. The fabrication procedure is performed by using nanosphere lithography with reactive ion etching, followed by Ag thin-film deposition. The mechanism of the surface and gap plasmon modes supported by the fabricated structure is numerically demonstrated by the three-dimensional finite element method. The measured and simulated absorptance spectra are observed to have a same trend and a qualitative fit. Our fabricated plasmonic sensor shows an average sensitivity of 340.0 nm/RIU when applied to a refractive index sensor ranging from 1.0 to 1.6. The proposed substrates provide a practical plasmonic nanorod-based sensing platform, and the fabrication methods used are technically effective and low-cost. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/1764 | DOI: | 10.3390/nano9121691 |
Appears in Collections: | 光電與材料科技學系 |
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