Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Photo-thermal Tuning of Graphene Oxide Coated Integrated Optical Waveguides

Version 1 : Received: 21 June 2022 / Approved: 21 June 2022 / Online: 21 June 2022 (08:06:34 CEST)

How to cite: Moss, D. Photo-thermal Tuning of Graphene Oxide Coated Integrated Optical Waveguides. Preprints 2022, 2022060291. https://doi.org/10.20944/preprints202206.0291.v1 Moss, D. Photo-thermal Tuning of Graphene Oxide Coated Integrated Optical Waveguides. Preprints 2022, 2022060291. https://doi.org/10.20944/preprints202206.0291.v1

Abstract

We experimentally investigate power-sensitive photo-thermal tuning (PTT) of two-dimensional (2D) graphene oxide (GO) films coated on integrated optical waveguides. We measure the light power thresholds for reversible and permanent GO reduction in silicon nitride (SiN) waveguides integrated with 1 and 2 layers of GO. Raman spectra at different positions of a hybrid waveguide with permanently reduced GO are characterized, verifying the inhomogeneous GO reduction along the direction of light propagation through the waveguide. The differences between the PTT induced by a continuous-wave laser and a pulsed laser are also compared, confirming that the PTT mainly depend on the average input power. These results reveal interesting features for 2D GO films coated on integrated optical waveguides, which are of fundamental importance for the control and engineering of GO’s properties in hybrid integrated photonic devices.

Keywords

2D materials; integrated optics; photo-thermal changes; graphene oxide

Subject

Physical Sciences, Optics and Photonics

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