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  • Title: Subwavelength silicon microcavities.
    Author: Shainline J, Elston S, Liu Z, Fernandes G, Zia R, Xu J.
    Journal: Opt Express; 2009 Dec 07; 17(25):23323-31. PubMed ID: 20052259.
    Abstract:
    We present a study of the first silicon microdisk resonators which are smaller than the free-space resonant wavelength in all spatial dimensions. Spectral details of whispering gallery modes with azimuthal mode number m = 4-7 are measured in microdisks with diameters between 1.35 and 1.89microm and are studied at wavelengths from 1.52 to 1.62microm. For the structures considered here, m = 5 is the highest azimuthal mode order in a subwavelength cavity and has measured Q = 1250. These results agree well with theoretical calculations using a finite difference frequency domain method and fit an exponential scaling law relating Q to disk radius via m.
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