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Pré-Publication, Document De Travail Année : 2022

Photo-thermal tuning of optical waveguides integrated with ultrathin 2D graphene oxide thin films

Résumé

We experimentally investigate power-sensitive photo-thermal tuning (PTT) of twodimensional (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.
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Dates et versions

hal-03713703 , version 1 (05-07-2022)

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  • HAL Id : hal-03713703 , version 1

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David Moss. Photo-thermal tuning of optical waveguides integrated with ultrathin 2D graphene oxide thin films. 2022. ⟨hal-03713703⟩
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