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안희상(Heesang Ahn),안동규(Dong-Gyu Ahn),송영민(Yung Min Song),김규정(Kyujung Kim) Korean Society for Precision Engineering 2016 한국정밀공학회지 Vol.33 No.5
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.
색 인지에 대한 심리보호효과를 가지는 나노홀어레이 광학필터 특성 분석
강태영(Tae Young Kang),안희상(Heesang Ahn),신동명(Dong-Myeong Shin),홍석원(Suck Won Hong),김규정(Kyujung Kim),이동훈(Donghoon Lee) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.6
We suggest and simulate an optical filter that a red wavelength range cannot transmit to protect the psychological stress that originates from the cognition of red color in emergency medical technicians. When a nanohole hexagonal array is fabricated on gold film using Anodic Aluminum Oxide (AAO), the blocked wavelength can be tuned by the hole diameter and film thickness. The characteristic of the transmittance for normal incident white light is simulated with Finite Element Method (FEM) in the MATLAB platform. Although the transmittance of the overall wavelength is reduced by 50% by the gold film, the transmittance of the red wavelength range is decreased by over 87%.