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오금윤(Geum-Yoon Oh),김두근(Doo-Gun Kim),김홍승(Hong-Seung Kim),이태경(Tae-Kyeong Lee),최영완(Young-Wan Choi) 대한전기학회 2012 전기학회논문지 Vol.61 No.3
We propose a novel micro surface plasmon resonance (SPR) sensor system based on polymer materials. The proposed SPR system consists of the incident medium with polymer waveguide and the gold thin film for sensing area. Using a polymer optical waveguide instead of a prism in SPR sensing system offers miniaturization, low cost, and potable sensing capability. The whole device performance was analyzed using the finite-difference time domain method. The optimum gold thickness in the attenuated total reflection mirror of polymer waveguide is around 50 nm and the resonance angle to generate surface plasmon wave is 68 degrees.
실시간 미세플라스틱 카운팅을 위한 레이저 유도 형광 특성 분석
고승현,오금윤 한국전기전자재료학회 2022 전기전자재료학회논문지 Vol.35 No.2
In this paper, laser-induced fluorescence properties of four plastics were characterized through spectrometer analysis for real-time microplastic counting. Recently, environmental problems related to microplastics have emerged. In order to detect microplastics, analysis methods such as FT-IR and Raman are used. However, they have the disadvantages of being timeconsuming and requiring a pretreatment process. In most plastic products on the market, 10% to 30% of plasticizers and reinforcing agents are added. Therefore, most microplastics present in seawater and freshwater emit fluorescence signals by 270 nm UV light source regardless of their type due to their molecular structure due to additives. Real-time microplastics counting is possible more easily by using the proposed laser-induced fluorescence detection method because of the fluorescence expression characteristic of 340 nm that appears due to the plasticizer of plastics.
김두근,김홍승,오금윤,김선훈,기현철,김태언,김회종,최영완,Kim, Doo Gun,Kim, Hong-Seung,Oh, Geum-Yoon,Kim, Seon-Hoon,Ki, Hyun-Chul,Kim, Tae-Un,Kim, Hwe Jong,Ma, Ping,Hafner, Christian,Choi, Young-Wan 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.3
We have investigated the optical properties of plamonic waveguide with tapered structure based on InP material for photonic integrated circuit(PIC). The proposed plasmonic waveguide is covered with the Ag thin film to generate the plasmonic wave on metallic interface. The optical characteristics of plasmonic waveguide were calculated using the three-dimensional finite-difference time-domain method. The plasmonic waveguide was fabricated with the lengths of 2 to $10{\mu}m$ and the widths of 400 to 700 nm, respectively. The plasmonic mode and optical loss were measured. The optimum plasmonic length is $10{\mu}m$ and widths are 600 and 700 nm in the fabricated waveguide. This plasmonic waveguide can be directly integrated with other conventional optical devices and can be essential building blocks of PIC.