Large-area tungsten disulfide for ultrafast photonics

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)1871-1877
Number of pages7
JournalNanoscale
Volume9
Issue number5
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Researchers

  • Peiguang Yan
  • Hao Chen
  • Jinde Yin
  • Zihan Xu
  • Jiarong Li
  • Zike Jiang
  • Wenfei Zhang
  • Jinzhang Wang
  • Irene Ling Li
  • Zhipei Sun

  • Shuangchen Ruan

Research units

  • Shenzhen University
  • Shenzen 6Carbon Technology

Abstract

Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have attracted significant interest in various optoelectronic applications due to their excellent nonlinear optical properties. One of the most important applications of TMDs is to be employed as an extraordinary optical modulation material (e.g., the saturable absorber (SA)) in ultrafast photonics. The main challenge arises while embedding TMDs into fiber laser systems to generate ultrafast pulse trains and thus constraints their practical applications. Herein, few-layered WS2 with a large-area was directly transferred on the facet of the pigtail and acted as a SA for erbium-doped fiber laser (EDFL) systems. In our study, WS2 SA exhibited remarkable nonlinear optical properties (e.g., modulation depth of 15.1% and saturable intensity of 157.6 MW cm(-2)) and was used for ultrafast pulse generation. The soliton pulses with remarkable performances (e.g., ultrashort pulse duration of 1.49 ps, high stability of 71.8 dB, and large pulse average output power of 62.5 mW) could be obtained in a telecommunication band. To the best of our knowledge, the average output power of the mode-locked pulse trains is the highest by employing TMD materials in fiber laser systems. These results indicate that atomically large-area WS2 could be used as excellent optical modulation materials in ultrafast photonics.

    Research areas

  • TRANSITION-METAL DICHALCOGENIDES, SWITCHED FIBER LASER, EVANESCENT FIELD INTERACTION, MOS2 SATURABLE ABSORBER, SINGLE-LAYER, WS2, GRAPHENE, ABSORPTION, SHEETS, WSE2

ID: 11465300