Article
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Supercontinuum Generation in Graphene Oxide Coated Waveguides
Version 1
: Received: 1 October 2022 / Approved: 4 October 2022 / Online: 4 October 2022 (10:10:29 CEST)
How to cite: Moss, D. Supercontinuum Generation in Graphene Oxide Coated Waveguides. Preprints 2022, 2022100015. https://doi.org/10.20944/preprints202210.0015.v1 Moss, D. Supercontinuum Generation in Graphene Oxide Coated Waveguides. Preprints 2022, 2022100015. https://doi.org/10.20944/preprints202210.0015.v1
Abstract
Enhanced supercontinuum generation (SCG) is experimentally demonstrated in integrated silicon nitride (Si3N4) waveguides incorporating highly nonlinear graphene oxide (GO) in the form of two-dimensional (2D) films. On-chip integration of the 2D GO films with precise control of their thickness is realized by using a transfer-free and layer-by-layer coating method. The control of the film length and coating position is achieved via window opening in the upper silica cladding of the photonic integrated chips. Detailed SCG measurements are performed using the fabricated devices with different waveguide geometries and GO film thicknesses, and the results are compared with devices without GO. Significantly improved spectral broadening of ultrashort optical pulses with ultrahigh peaks powers exceeding 1000 W is observed for the hybrid devices, achieving up to 2.4 times improvement in the spectral bandwidth relative to devices without GO. Theoretical analyses for the influence of GO film thickness, coating length, coating position, and waveguide geometry are also provided by fitting the experimental results with theory, showing that there is still significant room for further improvement. This work opens up a promising new avenue towards improving the SCG performance of photonic integrated devices by incorporating functional 2D materials.
Keywords
Integrated photonics; 2D material; nonlinear optics; supercontinuum generation
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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