In-fibre second-harmonic generation with embedded two-dimensional materials

Ngo GQ, Najafidehaghani E, Gan Z, Khazaee S, Siems MP, George A, Schartner EP, Nolte S, Ebendorff-Heidepriem H, Pertsch T, Tuniz A, Schmidt MA, Peschel U, Turchanin A, Eilenberger F (2022)

Publication Type: Journal article

Publication year: 2022


Book Volume: 16

Pages Range: 769-776

Journal Issue: 11

DOI: 10.1038/s41566-022-01067-y


Silica-based optical fibres are a workhorse of nonlinear optics, providing ready access to a range of nonlinear phenomena including solitons and self-phase modulation. However, they have one fundamental limitation: due to the amorphous nature of silica, they do not exhibit second-order nonlinearity, except for negligible contributions from surfaces. Here we demonstrate second-harmonic generation in functionalized optical fibres by using a monolayer of highly nonlinear MoS2 directly grown on the fibre’s core. The MoS2-functionalized fibre exhibits a second-order susceptibility (χ(2)) value of 44 pm V–1 and a second-harmonic generation conversion efficiency of 0.2 × 10–3 m−2 W−1. This approach is scalable and can be generalized to other transition metal dichalcogenides and a wide range of waveguide systems. Our results demonstrate a new approach towards efficient in-fibre second-harmonic generation sources and may establish a platform for χ(2)-based nonlinear fibre optics, optoelectronics, photonics platforms, integrated optical architectures and active fibre networks.

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Ngo, G.Q., Najafidehaghani, E., Gan, Z., Khazaee, S., Siems, M.P., George, A.,... Eilenberger, F. (2022). In-fibre second-harmonic generation with embedded two-dimensional materials. Nature Photonics, 16(11), 769-776.


Ngo, Gia Quyet, et al. "In-fibre second-harmonic generation with embedded two-dimensional materials." Nature Photonics 16.11 (2022): 769-776.

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