Transition-metal dichalcogenides heterostructure saturable absorbers for ultrafast photonics

Research output: Contribution to journalArticleScientificpeer-review


  • Hao Chen
  • Jinde Yin
  • Jingwei Yang
  • Xuejun Zhang
  • Mengli Liu
  • Zike Jiang
  • Jinzhang Wang
  • Zhipei Sun

  • Tuan Guo
  • Wenjun Liu
  • Peiguang Yan

Research units

  • Shenzhen University
  • Jinan University
  • Beijing University of Posts and Telecommunications


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.


Original languageEnglish
Pages (from-to)4279-4282
Number of pages4
JournalOptics Letters
Issue number21
Publication statusPublished - 1 Nov 2017
MoE publication typeA1 Journal article-refereed

ID: 16080325