Fabrication and Characterization of Localized Surface Plasmon Resonance Sensors for Mid-Infrared Range Applications

• Main Authors: Chien-Lin Wu, 吳建霖
• Other Authors: 王倫
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/rnms86

碩士 === 國立臺灣大學 === 光電工程學研究所 === 107 === Recently the fabrication of metallic nano-structures and subsequent applications to sensing based on localized surface plasmon resonance (LSPR) has drawn a lot of attentions. By nanotransfer printing (nTP) method, fabrication of quality SPR sensors was realized in our lab. However, the applications were limited in the visible range, so extension to mid-infrared is attractive. In this thesis, we study how to fabricate metallic nanodisks. Through a novel fabrication process, the periodic metallic nanodisks were made onto silicon chip and D shaped silicon core fiber. To simulate the optical characteristics of the LSPR sensors, a commercial software, FDTD Solutions was used in this study. The simulated results revealed the trends of the measured transmission spectra and the characteristics of LSPR were also confirmed and discussed. In refractive index sensing, various concentrations of glucose solution were under test, and the resonant wavelengths of the spectra shifted as the concentration changed. The fingerprint signal in mid infrared range was enhanced by LSPR.