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- W3170902912 abstract "Silicon subwavelength grating waveguides enable flexible design in integrated photonics through nano-scale refractive index engineering. Here, we explore the possibility of combining silicon subwavelength gratings waveguides with a high-index chalcogenide glass as a top cladding, thus modifying the waveguiding behavior and opening a new design axis for these structures. A detailed investigation of the heterogeneous SWG waveguide with high-index cladding is presented based on analytical and numerical simulations. We design, fabricate and characterize silicon subwavelength grating waveguide microring resonators with an As 20 S 80 cladding. Thanks to As 20 S 80 negative thermo-optic coefficient, we achieve near athermal behavior with a measured minimum thermally induced resonance shift of −1.54 pm/K, highlighting the potential of subwavelength grating waveguides for modal confinement engineering and to control light-matter interaction. We also show that the chalcogenide glass can be thermally reflowed to remove air gaps inside the cladding, resulting in a highly conformal structure. These types of waveguides can find application in reconfigurable photonics, nonlinear optics, metamaterials or slow light." @default.
- W3170902912 created "2021-06-22" @default.
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- W3170902912 date "2021-06-17" @default.
- W3170902912 modified "2023-10-10" @default.
- W3170902912 title "Silicon subwavelength grating waveguides with high-index chalcogenide glass cladding" @default.
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- W3170902912 doi "https://doi.org/10.1364/oe.430204" @default.
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