Research Papers

Significantly enhanced sensitivity of surface plasmon resonance sensor with self-assembled metallic nanoparticles

[+] Author Affiliations
Hong-Seung Kim, Byeong-Hyeon Lee, Geum-Yoon Oh, Tae-Kyeong Lee, Tae-Ryong Kim, Young-Wan Choi

Chung-Ang University, School of Electrical and Electronics Engineering, Laboratory of Optoelectronics and Circuit System, 84, Heukseok-ro, Seoul 156-756, Republic of Korea

Doo-Gun Kim

Korea Photonics Technology Institute, 9, Cheomdan venture-ro 108 beon-gil, Gwangju 500-460, Republic of Korea

J. Nanophoton. 10(2), 026012 (May 02, 2016). doi:10.1117/1.JNP.10.026012
History: Received December 15, 2015; Accepted March 23, 2016
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Abstract.  A surface plasmon resonance (SPR) sensor hybridized with self-assembled metallic nanoparticles is proposed and experimentally demonstrated. The measured sensitivity of the proposed SPR sensor is 110.77  deg/RIU, while that of a conventional SPR sensor is 84.75  deg/RIU. The enhanced sensitivity is attributed to the strong localized surface plasmons and the increased surface interaction area by the nanoparticles. Angle variation measurement, which is an easy detection method using bulk optics, is possible with this structure because a supplementary metallic thin film layer on the nanoparticles leads to utilization of the sensitive variation of the strong localized field by the change of the refractive index. Furthermore, the proposed structure can be fabricated with a very simple three-step nonlithographic process.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Hong-Seung Kim ; Byeong-Hyeon Lee ; Geum-Yoon Oh ; Tae-Kyeong Lee ; Doo-Gun Kim, et al.
"Significantly enhanced sensitivity of surface plasmon resonance sensor with self-assembled metallic nanoparticles", J. Nanophoton. 10(2), 026012 (May 02, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.026012


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