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Sandwiched hybrid waveguide platform for integrated photonics application

Dash, RK and Selvaraja, SK (2024) Sandwiched hybrid waveguide platform for integrated photonics application. In: Optics Communications, 550 . pp. 1-10.

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Official URL: https://doi.org/10.1016/j.optcom.2023.129959


We propose and demonstrate a hybrid waveguide platform using layered amorphous silicon and silicon nitride. The waveguide offers more degrees of freedom to design waveguides with desired confinement, effective index and polarization birefringence. Unlike single core material, the proposed waveguide offers design flexibility, and light confinement in the layers is polarization-dependent. We present a detailed waveguide design and analysis of efficient fiber-chip grating couplers with a coupling efficiency of �3.27 dB and �8 dB for TE and TM polarization, respectively. The couplers offer a 3 dB bandwidth of 100 nm. Furthermore, we demonstrate excitation of TE and TM modes exploiting the polarization-dependent confinement using thermo-optic characteristics of a ring resonator. © 2023 Elsevier B.V.

Item Type: Journal Article
Publication: Optics Communications
Publisher: Elsevier B.V.
Additional Information: The copyright for this article belongs to author.
Keywords: Amorphous silicon; Coremaking; Degrees of freedom (mechanics); Hybrid materials; Optical resonators; Optical waveguides; Silicon nitride, Core material; Design flexibility; Effective index; Grating couplers; Hybrid waveguides; Integrated photonics; Light confinements; Photonic application; Ring resonator; Waveguide design, Polarization
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 28 Feb 2024 11:23
Last Modified: 28 Feb 2024 11:23
URI: https://eprints.iisc.ac.in/id/eprint/83712

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