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Nonlinear optical performance of few-layer molybdenum diselenide as a slow-saturable absorber

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Abstract

Two-dimensional transition metal dichalcogenides are considered promising materials for next-generation photonics and nano-optical devices. Although many previous reports have shown saturable absorption of molybdenum diselenide (MoSe2), these nonlinear optical (NLO) properties of MoSe2 were measured in separate works and under different conditions with their hot-carrier relaxations. Here, we conducted a series of coherent studies on the NLO properties of few-layer MoSe2 via open-aperture Z-scan and degenerate pump-probe techniques. These measurements were taken to test the materials’ capabilities as a slow-saturable absorber. A slow-absorber model was employed to analyze the NLO measurements, and the results show that the NLO modulation depth was modeled to be 7.4% and 15.1% for the linear absorption coefficients of 5.22 cm?1 and 6.51 cm?1, respectively. The corresponding saturated intensities were modeled to be 39.37 MW/cm2 and 234.75 MW/cm2, respectively. The excitation carrier recovery time of few-layer MoSe2 was measured by degenerate pump-probe techniques to be ~220 ps. These nonlinear optical performances make it a promising slow-saturable absorber for passive mode locking in femtosecond lasers.

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DOI:10.1364/prj.6.000674

基金项目:Science Foundation Ireland (SFI)10.13039/501100001602 (12/IA/1306); Seventh Framework Programme (FP7)10.13039/100011102 (ISLA project no. 287732); National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61522510, 61675217, 11704261, 11575118); Strategic Priority Research Program of Chinese Academy of Sciences (CAS)10.13039/501100002367 (XDB16030700); Key Research Program of Frontier Science of Chinese Academy of Sciences (QYZDB-SSW-JSC041); the Program of Shanghai Academic Research Leader (17XD1403900); Shenzhen Key Lab Fund (ZDSYS 20170228105421966).

收稿日期:2018-03-14

录用日期:2018-04-16

网络出版日期:2018-04-26

作者单位    点击查看

Gaozhong Wang:Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University, Shenzhen 518060, ChinaSchool of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
Guangxing Liang:Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University, Shenzhen 518060, China
Aidan A. Baker-Murray:School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
Kangpeng Wang:School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Irelande-mail: wangkangpeng@msn.com
Jing Jing Wang:School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
Xiaoyan Zhang:Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Daniel Bennett:School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
Jing-Ting Luo:Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University, Shenzhen 518060, Chinae-mail: luojt@szu.edu.cn
Jun Wang:Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Ping Fan:Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University, Shenzhen 518060, China
Werner J. Blau:School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland

联系人作者:Ping Fan(fanping308@126.com)

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引用该论文

Gaozhong Wang, Guangxing Liang, Aidan A. Baker-Murray, Kangpeng Wang, Jing Jing Wang, Xiaoyan Zhang, Daniel Bennett, Jing-Ting Luo, Jun Wang, Ping Fan, and Werner J. Blau, "Nonlinear optical performance of few-layer molybdenum diselenide as a slow-saturable absorber," Photonics Research 6(7), 674-680 (2018)

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