7 March 2014 Analysis of hybridized surface plasmon resonance sensor with metallic nanoparticles for high sensitivity
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Abstract
In this paper, we propose a surface plasmon resonance (SPR) sensor with metallic nano-particles, which is based on the Kretschmann configuration for reflective-type measurement with enhanced sensitivity. The proposed structure is analyzed and compared with a conventional Kretschmann configuration by using 3D finite-difference time-domain method. The proposed structure is composed of semi-spherical nano-particles and a thin cladding layer. The evanescent field on the metallic structure is enhanced by the factor of 2.7, where the diameter of nano-particles, fill factor, and thickness of cladding film layer TF are 30 nm, 50 %, and 40 nm, respectively. On the other hand, the enhancement of the evanescent field in the conventional SPR sensor is 1.7 for the same TF. Because of the enhanced evanescent field, the sensitivity of our proposed sensor is maximized to 137.1 degree/RIU while that of a conventional SPR sensor is 99.6 degree/RIU.
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Byeong-Hyeon Lee, Byeong-Hyeon Lee, Geum-Yoon Oh, Geum-Yoon Oh, Hong-Seung Kim, Hong-Seung Kim, Tae-Kyeong Lee, Tae-Kyeong Lee, Doo Gun Kim, Doo Gun Kim, Young-Wan Choi, Young-Wan Choi, } "Analysis of hybridized surface plasmon resonance sensor with metallic nanoparticles for high sensitivity", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 898010 (7 March 2014); doi: 10.1117/12.2039141; https://doi.org/10.1117/12.2039141
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