Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Estimation of Sensitivity Enhancements of Material-Dependent Localized Surface Plasmon Resonance Sensor Using Nanowire Patterns

금속물질에 따른 나노구조를 이용한 국소 표면 플라즈몬 공명 센서 특성 분석

  • Ahn, Heesang (Department of Cogno-Mechatronics Engineering, Pusan National University) ;
  • Ahn, Dong-Gyu (Department of Mechanical Engineering, Chosun University) ;
  • Song, Yung Min (Department of Electronics Engineering, Pusan National University) ;
  • Kim, Kyujung (Department of Cogno-Mechatronics Engineering, Pusan National University)
  • 안희상 (부산대학교 인지메카트로닉스공학과) ;
  • 안동규 (조선대학교 기계공학과) ;
  • 송영민 (부산대학교 전자공학과) ;
  • 김규정 (부산대학교 인지메카트로닉스공학과)
  • Received : 2016.04.04
  • Accepted : 2016.04.09
  • Published : 2016.05.01
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Abstract

We explored localized plasmonic field enhancements using nanowire patterns to improve the sensitivity of a surface plasmon resonance (SPR) sensor. Two different materials, gold and silver, were considered for sample materials. Gold and silver nanowire patterns were fabricated by electron beam lithography for experimental measurements. The wavelength SPR sensor was also designed for these experiments. The material-dependent field enhancements on nanowire patterns were first calculated based on Maxwell's equations. Resonance wavelength shifts were indicated as changes in the refractive index from 1.33 to 1.36. The SPR sensor with silver nanowire patterns showed a much larger resonance wavelength shift than the sensor with gold nanowire patterns, in good agreement with simulation results. These results suggest that silver nanowire patterns are more efficient than gold nanowire patterns, and could be used for sensitivity enhancements in situations where biocompatibility is not a consideration.

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References

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