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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  >  Improving Sensitivity of Photonic Crystal-Based Biosensors by A Cavity Arrangement


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83932


    Title: Improving Sensitivity of Photonic Crystal-Based Biosensors by A Cavity Arrangement
    Authors: M.H. Nguyen;W.C. Chiu;M.C. Lee;F.G. Tseng
    教師: 李明昌
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: The 16th International Conference on Solid-State Sensors, Actuators and Microsystems, Beijing, China, 5-9 June 2011
    Keywords: Photonic
    Biosensors
    Abstract: A photonic crystal (PhC) biosensor is presented to have improved sensitivity for detecting surrounding media by incorporation of nanophotonic cavities. This device, consisting of a tailored PhC defect cavity placed next to a PhC waveguide (PhC-WG), is fabricated on silicon-on-insulator (SOI) substrate. Unlike conventional PhC defects, this tailored cavity creates two decoupled resonant modes that both have high quality factor (Q-factor). Moreover, this new arrangement of PhC cavity enhances optical coupling between the cavity and waveguide, leading to a strong interaction between light and the surrounding medium in the vicinity of cavity. The sensor was characterized to be with sensitivity of 180 nm/RIU, Q-factor of about 8,000 and limit of detection (LOD) of 5.56 × 10-5 RIU. The analytes under testing can be gases or liquids with a very small amount required: 17.5 pl for bare devices or 72 nl for microfludic devices covered with PDMS microchannels.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83932
    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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