Integrated optical SPR sensor based on mode conversion efficiency

    Authors

    H. S. Pang; T. W. Lee; M. G. Moharam; P. L. Likamwa;H. J. Cho

    Comments

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    Abbreviated Journal Title

    Electron. Lett.

    Keywords

    SURFACE; BIOSENSORS; Engineering, Electrical & Electronic

    Abstract

    A novel type of integrated optical surface plasmon resonance (SPR) sensor is proposed, for which the operational principle is based on the launching efficiency of eigenmodes in the sensor head. The sensor comprises an inverted-rib-type dielectric waveguide, a portion of which is covered with a thin gold layer. Eigenmodes in the sensor head are coupled modes of a surface plasmon polariton and a dielectric guided wave. The excitation efficiency of the coupled modes varies significantly depending on the refractive index of the analyte medium on the sensor head. Following this principle, the transmission coefficient of light through the sensor head can be used as a sensitive measure of the variation in the refractive index of the analyte medium.

    Journal Title

    Electronics Letters

    Volume

    44

    Issue/Number

    16

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    971

    Last Page

    972

    WOS Identifier

    WOS:000258593900018

    ISSN

    0013-5194

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