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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 會議論文  >  Study of Photonic Crystal Cavities for Biosensors


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83942


    Title: Study of Photonic Crystal Cavities for Biosensors
    Authors: Minh-Hang Nguyen;Ming-Chang M. Lee;Fan-Gang Tseng
    教師: 李明昌
    Date: 2010
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: IEEE the 2010 International Conference on Nanotechnology, Seoul, Korea, 17-20 Aug. 2010
    Keywords: Study of Photonic Crystal Cavities for Biosensors
    Abstract: A highly sensitive biosensor based on a silicon photonic crystal waveguide incorporating microcavities is investigated using two-dimensional Finite Difference Time Domain method. With a microcavity placed near the waveguide, a dip is observed on the waveguide transmission spectrum, corresponding to the resonance wavelength of the cavity. Any change of the medium surrounding to the waveguide and cavity results in the shift of the dip in the transmission spectrum. Our simulation shows an optimal geometry of the cavity nearby the waveguide to have high sensitivity. Several materials with refractive indices ranging from 1 (the air) to 1.57 (Bovine serum albumin - BSA) were studied and showed that the best sensitivity of 194 nm/RIU and limit of detection of 5×10-5 RIU can be achieved. The varied resonance wavelength as a second-order polynomial function of refractive index was observed. The sensor is appropriate for detecting homogeneous medium.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83942
    Appears in Collections:[電機工程學系] 會議論文
    [奈微與材料科技中心] 會議論文
    [光電工程研究所] 會議論文
    [奈米工程與微系統研究所] 會議論文

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