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Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption

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Title: Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption
Authors: Howe, RCT
Woodward, RI
Hu, G
Yang, Z
Kelleher, EJR
Hasan, T
Item Type: Journal Article
Abstract: We use liquid phase exfoliation to produce dispersions of molybdenum disulfide (MoS2) nanoflakes in aqueous surfactant solutions. The chemical structures of the bile salt surfactants play a crucial role in the exfoliation and stabilization of MoS2. The resultant MoS2 dispersions are heavily enriched in single and few (<6) layer flakes with large edge to surface area ratio. We use the dispersions to fabricate free-standing polymer composite wide-band saturable absorbers to develop mode-locked and Q-switched fiber lasers, tunable from 1535 to 1565 and 1030 to 1070nm, respectively. We attribute this sub-bandgap optical absorption and its nonlinear saturation behavior to edge-mediated states introduced within the material band-gap of the exfoliated MoS2 nanoflakes.
Issue Date: 13-Jan-2016
Date of Acceptance: 11-Dec-2015
URI: http://hdl.handle.net/10044/1/42182
DOI: https://dx.doi.org/10.1002/pssb.201552304
ISSN: 0370-1972
Publisher: Wiley
Start Page: 911
End Page: 917
Journal / Book Title: Physica Status Solidi (B) Basic Research
Volume: 253
Issue: 5
Copyright Statement: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pssb.201552304/abstract;jsessionid
Sponsor/Funder: Engineering and Physical Sciences Research Council
Keywords: Applied Physics
0204 Condensed Matter Physics
0206 Quantum Physics
1007 Nanotechnology
Publication Status: Published
Appears in Collections:Photonics
Faculty of Natural Sciences



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