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- W2994666369 abstract "Silicon nitride ($Si_3N_4$) planar waveguide platform combined with silicon-on-insulator (SOI) devices offer a whole new generation of system-on-chip applications. Therefore, efficient coupling of an $Si_3N_4$ waveguide to an SOI waveguide is essential. We present a coupler to interface a 1.8 $mu m$-wide $Si_3N_4$ waveguide to a 0.5 $mu m$-wide SOI waveguide based on the focusing property of the Luneburg lens. In order to match the refractive indices of the waveguides with the edges of the lens, one side of the lens is flattened with quasi-conformal transformation optics. The designed coupler is implemented by graded photonic crystals. The three-dimensional numerical simulations indicate that the 1.93 $mu m$-long coupler has an average coupling loss of 0.13 dB in the C-band." @default.
- W2994666369 created "2019-12-26" @default.
- W2994666369 creator A5030147048 @default.
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- W2994666369 date "2020-04-01" @default.
- W2994666369 modified "2023-10-16" @default.
- W2994666369 title "Coupling Si3N4 waveguide to SOI waveguide using transformation optics" @default.
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- W2994666369 doi "https://doi.org/10.1016/j.optcom.2019.125089" @default.
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