Accurate wavelength prediction of photonic crystal resonant reflection and applications in refractive index measurement

Pétur Gordon Hermannsson, Christoph Vannahme, Cameron L. C. Smith, Anders Kristensen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    In the past decade, photonic crystal resonant reflectors have been increasingly used as the basis for label-free biochemical assays in lab-on-a-chip applications. In both designing and interpreting experimental results, an accurate model describing the optical behavior of such structures is essential. Here, an analytical method for precisely predicting the absolute positions of resonantly reflected wavelengths is presented. The model is experimentally verified to be highly accurate using nanoreplicated, polymer-based photonic crystal grating reflectors with varying grating periods and superstrate materials. The importance of accounting for material dispersion in order to obtain accurate simulation results is highlighted, and a method for doing so using an iterative approach is demonstrated. Furthermore, an application for the model is demonstrated, in which the material dispersion of a liquid is extracted from measured resonance wavelengths.
    Original languageEnglish
    Title of host publication2014 IEEE SENSORS
    Number of pages4
    PublisherIEEE
    Publication date2014
    Pages1399-1402
    ISBN (Print)9781479901623
    DOIs
    Publication statusPublished - 2014

    Keywords

    • General Topics for Engineers

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