ArticleLight, science & applications2020
High-efficiency second-order nonlinear processes in an optical microfibre assisted by few-layer GaSe.
Article in Light, science & applications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Nonlinear phase-matched van der Waals crystals integrated on optical fibres.Nature materials · 2026Article
- Roadmap for Photonics with 2D Materials.ACS photonics · 2025Review
- Enhanced vertical second harmonic generation from layered GaSe coupled to photonic crystal circular Bragg resonators.Nanophotonics (Berlin, Germany) · 2024Article
- Two-dimensional material integrated micro-nano fiber, the new opportunity in all-optical signal processing.Nanophotonics (Berlin, Germany) · 2023Review
- Silica optical fiber integrated with two-dimensional materials: towards opto-electro-mechanical technology.Light, science & applications · 2021Review
- Optical fibres with embedded two-dimensional materials for ultrahigh nonlinearity.Nature nanotechnology · 2020Article
- Performance of integrated optical switches based on 2D materials and beyond.Frontiers of optoelectronics · 2020Review
Corrections and comments
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Authors and funding
8 authors.
Funding
Abstract
The centrosymmetric nature of silica fibre precludes the realisation of second-order nonlinear processes in optical fibre systems. Recently, the integration of 2D materials with optical fibres has opened up a great opportunity to develop all-fibre active devices. Here, we demonstrate high-efficiency second-order nonlinear frequency conversions in an optical microfibre assisted with few-layer gallium selenide (GaSe) nanoflakes. Attributed to the strong evanescent field of the microfibre and ultrahigh second-order nonlinearity of the GaSe nanoflakes, second harmonic generation (SHG) and sum-frequency generation (SFG) are effectively achieved with only sub-milliwatt continuous-wave (CW) lasers in the wavelength range of 1500-1620 nm, covering the C and L telecom bands. The SHG intensity from the microfibre is enhanced by more than four orders of magnitude with the assistance of the GaSe nanoflakes on fibre nonlinear processes. Moreover, in the SFG process, the intensity transfer between different frequencies can be effectively manipulated by changing the wavelengths and powers of two pump lasers. The realised strong second-order nonlinearity in the GaSe-integrated microfibre might expand the applications of all-fibre devices in all-optical signal processing and new light source generation at awkward wavelengths.
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Registered trials
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