Supermode dispersion and waveguide-to-slot mode transition in arrays of silicon-on-insulator waveguides

Charles E De Nobriga, Gareth D Hobbs, William J Wadsworth, Jonathan C Knight, Dmitry V Skryabin, A Samarelli, M Sorel, R M De La Rue

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Abstract

In this Letter, we report group index measurements of the supermodes of an array of two strongly coupled silicon-on-insulator waveguides. We observe coupling-induced dispersion that is greater than the material and waveguide dispersion of the individual waveguides. We demonstrate that the system transforms from supporting the two supermodes associated with two coupled waveguides to the single mode of a slot waveguide within the investigated spectral range. During the cutoff of the antisymmetric supermode, an anti-crossing between the symmetric TM and antisymmetric TE supermodes has been observed.
Original languageEnglish
Pages (from-to)3925-3927
Number of pages3
JournalOptics Letters
Volume35
Issue number23
DOIs
Publication statusPublished - 2010

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Supermode dispersion and waveguide-to-slot mode transition in arrays of silicon-on-insulator waveguides. / De Nobriga, Charles E; Hobbs, Gareth D; Wadsworth, William J; Knight, Jonathan C; Skryabin, Dmitry V; Samarelli, A; Sorel, M; De La Rue, R M.

In: Optics Letters, Vol. 35, No. 23, 2010, p. 3925-3927.

Research output: Contribution to journalArticle

De Nobriga, Charles E ; Hobbs, Gareth D ; Wadsworth, William J ; Knight, Jonathan C ; Skryabin, Dmitry V ; Samarelli, A ; Sorel, M ; De La Rue, R M. / Supermode dispersion and waveguide-to-slot mode transition in arrays of silicon-on-insulator waveguides. In: Optics Letters. 2010 ; Vol. 35, No. 23. pp. 3925-3927.
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AU - Skryabin, Dmitry V

AU - Samarelli, A

AU - Sorel, M

AU - De La Rue, R M

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