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Effects of Disorder on the Frequency and Field of Photonic Crystal Cavity Resonators.

Matthews, C. and Seviour, Rebecca (2009) Effects of Disorder on the Frequency and Field of Photonic Crystal Cavity Resonators. Applied Physics B: Lasers and Optics, 94 (3). pp. 381-388. ISSN 0946-2171

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    Abstract

    In recent years the application of 2-Dimensional (2D) metallic Photonic-Crystal (PC) structures to high-power microwave devices, such as particle accelerators and gyrotrons, has gained increased interest. In this paper we focus on the effect disorder has on the resonant frequency and peak electric field in the defect site of a 2D PC structure. For disorders up to a maximum of 15% variation in position and radius, we found that disorder applied to the innermost rods surrounding the defect site dominates in determining the peak field and resonant frequency of the structure. We also show that small disorder (∼1%) can lead to an increase in peak field in certain cases due to structure optimization. We find that increasing levels of disorder lead to a decreasing average peak field for all structures. Whereas the mean resonant frequency remains constant for increasing disorder while the standard deviation increases. We then develop an understanding for this behaviour in terms of frequency detuning and mode confinement.

    Item Type: Article
    Journal or Publication Title: Applied Physics B: Lasers and Optics
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    Faculty of Science and Technology > School of Computing & Communications
    Faculty of Science and Technology > Engineering
    ID Code: 14053
    Deposited By: Dr Rebecca Seviour
    Deposited On: 10 Oct 2008 14:10
    Refereed?: Yes
    Published?: Published
    Last Modified: 18 Sep 2013 16:14
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/14053

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