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题名:
Ultrafast Saturable Absorption of Two-Dimensional MoS2 Nanosheets
作者: Wang, Kangpeng; Wang, Jun; Fan, Jintai; Lotya, Mustafa; O'Neill, Arlene; Fox, Daniel; Feng, Yanyan; Zhang, Xiaoyan; Jiang, Benxue; Zhao, Quanzhong; Zhang, Hongzhou; Coleman, Jonathan N.; Zhang, Long; Blau, Werner Josef
通讯作者: Wang, J (reprint author), Acad Sinica, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China.
刊名: ACS Nano
发表日期: 2013
DOI: 10.1021/nn403886t
卷: 7, 期:10, 页:9260
文章类型: Article
收录类别: SCI
英文摘要: Employing high-yield production of layered materials by liquid-phase exfoliation, molybdenum disulfide (MoS2) dispersions with large populations of single and few layers were prepared. Electron microscopy verified the high quality of the two-dimensional MoS2 nanostructures. Atomic force microscopy analysis revealed that similar to 39% of the MoS2 flakes had thicknesses of less than 5 nm. Linewidth and frequency difference of the E-2g(1) and A(1g) Raman modes confirmed the effective reduction of flake thicknesses from the bulk MoS2 to the dispersions. Ultrafast nonlinear optical (NLO) properties were investigated using an open-aperture Z-scan technique. All experiments were performed using 100 fs pulses at 800 nm from a mode-locked Ti:sapphire laser. The MoS2 nanosheets exhibited significant saturable absorption (SA) for the femtosecond pulses, resulting in the third-order NLO susceptibility Im chi((3)) similar to 10(-15) esu, figure of merit similar to 10(-15) esu cm, and free-carrier absorption cross section similar to 10(-17) cm(2). Induced free carrier density and the relaxation time were estimated to be similar to 10(16) cm(-3) and similar to 30 fs, respectively. At the same excitation condition, the MoS2 dispersions show better SA response than the graphene dispersions.
语种: 英语
项目资助者: 100-Talent Program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) [61178007] ; Science and Technology Commission of Shanghai Municipality (STCSM Nano Project) [11 nm0502400] ; Science and Technology Commission of Shanghai Municipality (Shanghai Pujiang Program) [12PJ1409400] ; STCSM Excellent Academic Leader of Shanghai [10XD1404600] ; Shanghai Natural Science Foundation [11ZR1441500] ; ERC Grant SEMANTICS ; Science Foundation Ireland (SFI) [12/IA/1306] ; NSFC [51302285]
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内容类型: 期刊论文
版本: 出版稿
URI标识: http://ir.siom.ac.cn/handle/181231/14602
Appears in Collections:中科院强激光材料重点实验室_期刊论文

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作者单位: 1.[Wang, Kangpeng
2.Wang, Jun
3.Fan, Jintai
4.Feng, Yanyan
5.Zhang, Xiaoyan
6.Jiang, Benxue
7.Zhang, Long
8.Blau, Werner Josef] Acad Sinica, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China
9.[Lotya, Mustafa
10.O'Neill, Arlene
11.Fox, Daniel
12.Zhang, Hongzhou
13.Coleman, Jonathan N.
14.Blau, Werner Josef] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland
15.[Lotya, Mustafa
16.O'Neill, Arlene
17.Fox, Daniel
18.Zhang, Hongzhou
19.Coleman, Jonathan N.
20.Blau, Werner Josef] Trinity Coll Dublin, CRANN, Dublin 2, Ireland
21.[Zhao, Quanzhong] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

Recommended Citation:
Wang, Kangpeng,Wang, Jun,Fan, Jintai,et al. Ultrafast Saturable Absorption of Two-Dimensional MoS2 Nanosheets[J]. ACS Nano,2013,7(10):9260.
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