期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 33, 页码 5292-5299出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501972
关键词
2D materials; atom-thick transition metal dichalcogenides; chemical weathering exfoliation; MoS2 and WS2 monolayers; ultrafast saturable absorption
类别
资金
- National Basic Research Program of China [2012CB932302]
- National Natural Science Foundation of China [51321091, 61178060, 91221101]
- Natural Science Foundation for Distinguished Young Scholar of Shandong Province [2012JQ18]
- National Super Computing Centre in Jinan
2D transition metal dichalcogenides are attracting increased attention because of their excellent electronic and optical properties. Inspired by the natural weathering exfoliation of seaside rocks, a chemical weathering concept for fabricating atom-thick 2D materials from their bulk counterparts is proposed. It is experimentally demonstrated that chemical weathering-assisted exfoliation mechanism is a simple and efficient method of preparing atom-thick MoS2 and WS2 monolayers. These monolayers are difficult to prepare using other approaches. Interestingly, the as-prepared MoS2 and WS2 monolayers exhibit excellent saturable absorption and mode-locking properties in all-solid-state lasers because of intermediate states resulting from S-vacancy defects. The obtained passively Q-switched laser operation with 60 ns pulse width and ultrafast mode locking with 8.6 ps pulse width are promising for all-solid-state laser application.
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