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.


Journal Details

This article was published in the following journal.

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


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