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

Richard C. T. Howe; Robert I. Woodward; Guohua Hu; Zongyin Yang; Edmund J. R. Kelleher; Tawfique Hasan

doi:10.1002/pssb.201552304

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

Richard C. T. Howe^*, Robert I. Woodward, Guohua Hu, Zongyin Yang, Edmund J. R. Kelleher, Tawfique Hasan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

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 1070 nm, 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.

Original language	English
Pages (from-to)	911-917
Number of pages	7
Journal	Physica Status Solidi B: Basic Solid State Physics
Volume	253
Issue number	5
DOIs	https://doi.org/10.1002/pssb.201552304
Publication status	Published - May 2016
Externally published	Yes

Keywords

liquid phase exfoliation
MoS₂
saturable absorption
ultrafast laser

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10.1002/pssb.201552304

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

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 1070 nm, 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.",

keywords = "liquid phase exfoliation, MoS₂, saturable absorption, ultrafast laser",

author = "Howe, {Richard C. T.} and Woodward, {Robert I.} and Guohua Hu and Zongyin Yang and Kelleher, {Edmund J. R.} and Tawfique Hasan",

year = "2016",

month = may,

doi = "10.1002/pssb.201552304",

language = "English",

volume = "253",

pages = "911--917",

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T1 - Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption

AU - Howe, Richard C. T.

AU - Woodward, Robert I.

AU - Hu, Guohua

AU - Yang, Zongyin

AU - Kelleher, Edmund J. R.

AU - Hasan, Tawfique

PY - 2016/5

Y1 - 2016/5

N2 - 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 1070 nm, 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.

AB - 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 1070 nm, 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.

KW - liquid phase exfoliation

KW - MoS₂

KW - saturable absorption

KW - ultrafast laser

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DO - 10.1002/pssb.201552304

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JF - Physica Status Solidi B: Basic Solid State Physics

IS - 5

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

Abstract

Keywords

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