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Transition-metal dichalcogenides heterostructure saturable absorbers for ultrafast photonics.

08:00 EDT 1st November 2017 | BioPortfolio

Summary of "Transition-metal dichalcogenides heterostructure saturable absorbers for ultrafast photonics."

In this Letter, high-quality WS2 film and MoS2 film were vertically stacked on the tip of a single-mode fiber in turns to form heterostructure (WS2-MoS2-WS2)-based saturable absorbers with all-fiber integrated features. Their nonlinear saturable absorption properties were remarkable, such as a large modulation depth (∼16.99%) and a small saturable intensity (6.23  MW·cm(-2)). Stable pulses at 1.55 μm with duration as short as 296 fs and average power as high as 25 mW were obtained in an erbium-doped fiber laser system. The results demonstrate that the proposed heterostructures own remarkable nonlinear optical properties and offer a platform for adjusting nonlinear optical properties by stacking different transition-metal dichalcogenides or modifying the thickness of each layer, paving the way for engineering functional ultrafast photonics devices with desirable properties.

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This article was published in the following journal.

Name: Optics letters
ISSN: 1539-4794
Pages: 4279-4282

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