Modified step-theory for investigating mode coupling mechanism in photonic crystal waveguide taper

E. H. Khoo*, A. Q. Liu, J. H. Wu, Jingqi Li, D. Pinjala

*Corresponding author for this work

    Research output: Contribution to journalReview articlepeer-review

    8 Scopus citations

    Abstract

    In this paper, the mathematical model of the modified step-theory is derived based on the platform of two-dimensional photonic crystal structure that is infinitely long in third dimension. The mode coupling mechanism of photonic crystal tapers is theoretically studied using the modified step-theory. The model is verified by comparing the transmission spectrum obtained for the input/output defect coupler where it shows a good match of less than 5% discrepancy. The modified step-theory is applied to different taper structures to investigate the power loss during the transmission. The power loss at the relative position of the taper provides an explanation as to which taper designs give the highest coupling efficiency.

    Original languageEnglish (US)
    Pages (from-to)211-230
    Number of pages20
    JournalOptics Express
    Volume14
    Issue number13
    StatePublished - Jun 26 2006

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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