Abstract

As a saturable absorption material, the heterostructure with the van der Waals structure has been paid much attention in material science. In general, the heterogeneous combination is able to neutralize, or even exceed, the individual material’s advantages in some aspects. In this paper, which describes the magnetron sputtering deposition method, the tapered fiber is coated by the MoS2-WS2 heterostructure, and the MoS2-WS2 heterostructure saturable absorber (SA) is fabricated. The modulation depth of the prepared MoS2-WS2 heterostructure SA is measured to be 19.12%. Besides, the theoretical calculations for the band gap and carrier mobility of the MoS2-WS2 heterostructure are provided. By employing the prepared SA, a stable and passively erbium-doped fiber laser is implemented. The generated pulse duration of 154 fs is certified to be the shortest among all fiber lasers based on transition mental dichalcogenides. Results in this paper provide the new direction for the fabrication of ultrafast photon modulation devices.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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2018 (10)

X. T. Jiang, S. X. Liu, W. Y. Liang, S. J. Luo, Z. L. He, Y. Q. Ge, H. D. Wang, R. Cao, F. Zhang, Q. Wen, J. Q. Li, Q. L. Bao, D. Y. Fan, and H. Zhang, “Broadband nonlinear photonics in few-layer MXene Ti3C2Tx (T= F, O, or OH),” Laser Photonics Rev. 12(2), 1700229 (2018).
[Crossref]

L. Lu, Z. M. Liang, L. M. Wu, Y. X. Chen, Y. F. Song, S. C. Dhanabalan, J. S. Ponraj, B. Q. Dong, Y. J. Xiang, F. Xing, D. Y. Fan, and H. Zhang, “Few‐layer bismuthene: sonochemical exfoliation, nonlinear optics and applications for ultrafast photonics with enhanced stability,” Laser Photonics Rev. 12(1), 1700221 (2018).
[Crossref]

W. J. Liu, M. L. Liu, M. Lei, S. B. Fang, and Z. Y. Wei, “Titanium selenide saturable absorber mirror for passive Q-switched Er-doped fiber laser,” IEEE J. Sel. Top. Quant. 24(3), 1 (2018).
[Crossref]

W. Liu, M. Liu, Y. OuYang, H. Hou, G. Ma, M. Lei, and Z. Wei, “Tungsten diselenide for mode-locked erbium-doped fiber lasers with short pulse duration,” Nanotechnology 29(17), 174002 (2018).
[Crossref] [PubMed]

W. Liu, M. Liu, J. Yin, H. Chen, W. Lu, S. Fang, H. Teng, M. Lei, P. Yan, and Z. Wei, “Tungsten diselenide for all-fiber lasers with the chemical vapor deposition method,” Nanoscale 10(17), 7971–7977 (2018).
[Crossref] [PubMed]

M. L. Liu, Y.-Y. OuYang, H.-R. Hou, M. Lei, W.-J. Liu, and Z.-Y. Wei, “MoS2 saturable absorber prepared by chemical vapor deposition method for nonlinear control in Q-switching fiber laser,” Chin. Phys. B 27(8), 084211 (2018).
[Crossref]

W. J. Liu, M. L. Liu, H. N. Han, S. B. Fang, H. Teng, M. Lei, and Z. Y. Wei, “Nonlinear optical properties of WSe2 and MoSe2 films and their applications in passively Q-switched erbium doped fiber lasers,” Photon. Res. 6(10), C15–C21 (2018).
[Crossref]

W. Liu, M. Liu, Y. OuYang, H. Hou, M. Lei, and Z. Wei, “CVD-grown MoSe2 with high modulation depth for ultrafast mode-locked erbium-doped fiber laser,” Nanotechnology 29(39), 394002 (2018).
[Crossref] [PubMed]

W. Y. Li, Y. OuYang, G. Ma, M. Liu, and W. Liu, “Q-switched all-fiber laser with short pulse duration based on tungsten diselenide,” Laser Phys. 28(5), 055104 (2018).
[Crossref]

X. Zhang, S. Zhang, Y. Xie, J. Huang, L. Wang, Y. Cui, and J. Wang, “Tailoring the nonlinear optical performance of two-dimensional MoS2 nanofilms via defect engineering,” Nanoscale 10(37), 17924–17932 (2018).
[Crossref] [PubMed]

2017 (3)

H. Chen, J. Yin, J. Yang, X. Zhang, M. Liu, Z. Jiang, J. Wang, Z. Sun, T. Guo, W. Liu, and P. Yan, “Transition-metal dichalcogenides heterostructure saturable absorbers for ultrafast photonics,” Opt. Lett. 42(21), 4279–4282 (2017).
[Crossref] [PubMed]

J. Yin, H. Chen, W. Lu, M. Liu, I. Ling Li, M. Zhang, W. Zhang, J. Wang, Z. Xu, P. Yan, W. Liu, and S. Ruan, “Large-area and highly crystalline MoSe2 for optical modulator,” Nanotechnology 28(48), 484001 (2017).
[Crossref] [PubMed]

J. Baek, D. M. Yin, N. Liu, I. Omkaram, C. Jung, H. Im, S. Hong, S. M. Kim, Y. K. Hong, J. Hur, Y. Yoon, and S. Kim, “A highly sensitive chemical gas detecting transistor based on highly crystalline CVD-grown MoSe2 films,” Nano Res. 10(6), 1861–1871 (2017).
[Crossref]

2016 (12)

X. Zhang, S. Zhang, B. Chen, H. Wang, K. Wu, Y. Chen, J. Fan, S. Qi, X. Cui, L. Zhang, and J. Wang, “Direct synthesis of large-scale hierarchical MoS2 films nanostructured with orthogonally oriented vertically and horizontally aligned layers,” Nanoscale 8(1), 431–439 (2016).
[Crossref] [PubMed]

J. Zhang, J. Wang, P. Chen, Y. Sun, S. Wu, Z. Jia, X. Lu, H. Yu, W. Chen, J. Zhu, G. Xie, R. Yang, D. Shi, X. Xu, J. Xiang, K. Liu, and G. Zhang, “Observation of strong interlayer coupling in MoS2 /WS2 heterostructures,” Adv. Mater. 28(10), 1950–1956 (2016).
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J. Li, H. Luo, B. Zhai, R. Lu, Z. Guo, H. Zhang, and Y. Liu, “Black phosphorus: a two-dimension saturable absorption material for mid-infrared Q-switched and mode-locked fiber lasers,” Sci. Rep. 6(1), 30361 (2016).
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Y. H. Xu, Z. T. Wang, Z. N. Guo, H. Huang, Q. L. Xiao, H. Zhang, and X.-F. Yu, “Solvothermal synthesis and ultrafast photonics of black phosphorus quantum dots,” Adv. Opt. Mater. 4(8), 1223–1229 (2016).
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W. Liu, L. Pang, H. Han, W. Tian, H. Chen, M. Lei, P. Yan, and Z. Wei, “70-fs mode-locked erbium-doped fiber laser with topological insulator,” Sci. Rep. 6(1), 19997 (2016).
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D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
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H. Chen, L. Li, S. C. Ruan, T. Guo, and P. G. Yan, “Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers,” Opt. Eng. 55(8), 081318 (2016).
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B. Guo, Y. Yao, P. G. Yan, K. Xu, J. J. Liu, S. G. Wang, and Y. Li, “Dual-wavelength soliton mode-locked fiber laser with a WS2-based fiber taper,” IEEE Photonic. Tech. L. 28(3), 323–326 (2016).
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J. Lee, J. Park, J. Koo, Y. M. Jhon, and J. H. Lee, “Harmonically mode-locked femtosecond fiber laser using non-uniform, WS2-particle deposited side-polished fiber,” J. Opt. 18(3), 035502 (2016).
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D. Mao, X. She, B. Du, D. Yang, W. Zhang, K. Song, X. Cui, B. Jiang, T. Peng, and J. Zhao, “Erbium-doped fiber laser passively mode locked with few-layer WSe2/MoSe2 nanosheets,” Sci. Rep. 6(1), 23583 (2016).
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J. Koo, J. Park, J. Lee, Y. M. Jhon, and J. H. Lee, “Femtosecond harmonic mode-locking of a fiber laser at 3.27 GHz using a bulk-like, MoSe2-based saturable absorber,” Opt. Express 24(10), 10575–10589 (2016).
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J. Koo, Y. I. Jhon, J. Park, J. Lee, Y. M. Jhon, and J. H. Lee, “Near-infrared saturable absorption of defective bulk-structured WTe2 for femtosecond laser mode-locking,” Adv. Funct. Mater. 26(41), 7454–7461 (2016).
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2015 (19)

Z. Q. Luo, Y. Y. Li, M. Zhong, Y. Z. Huang, X. J. Wan, J. Peng, and J. Weng, “Nonlinear optical absorption of few-layer molybdenum diselenide (MoSe2) for passively mode-locked soliton fiber laser,” Photon. Res. 3(3), A79–A86 (2015).
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Y. Chen, G. Jiang, S. Chen, Z. Guo, X. Yu, C. Zhao, H. Zhang, Q. Bao, S. Wen, D. Tang, and D. Fan, “Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operation,” Opt. Express 23(10), 12823–12833 (2015).
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K. Wu, X. Zhang, J. Wang, and J. Chen, “463-MHz fundamental mode-locked fiber laser based on few-layer MoS(2) saturable absorber,” Opt. Lett. 40(7), 1374–1377 (2015).
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J. Du, Q. Wang, G. Jiang, C. Xu, C. Zhao, Y. Xiang, Y. Chen, S. Wen, and H. Zhang, “Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction,” Sci. Rep. 4(1), 6346 (2015).
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P. G. Yan, A. J. Liu, Y. S. Chen, H. Chen, S. C. Ruan, C. Y. Guo, S. F. Chen, I. L. Li, H. P. Yang, J. G. Hu, and G. Z. Cao, “Microfiber-based WS2-film saturable absorber for ultra-fast photonics,” Opt. Mater. Express 5(3), 479–489 (2015).
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D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS₂ saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
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K. Wu, X. Zhang, J. Wang, X. Li, and J. Chen, “WS2 as a saturable absorber for ultrafast photonic applications of mode-locked and Q-switched lasers,” Opt. Express 23(9), 11453–11461 (2015).
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R. Khazaeinezhad, S. H. Kassani, H. Jeong, K. J. Park, B. Y. Kim, D. Yeom, and K. Oh, “Ultrafast pulsed all-fiber laser based on tapered fiber enclosed by few-layer WS2 nanosheets,” IEEE Photonic. Tech. L. 27(15), 1581–1584 (2015).
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J. Sotor, I. Pasternak, A. Krajewska, W. Strupinski, and G. Sobon, “Sub-90 fs a stretched-pulse mode-locked fiber laser based on a graphene saturable absorber,” Opt. Express 23(21), 27503–27508 (2015).
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T. Gao, X. Song, H. Du, Y. Nie, Y. Chen, Q. Ji, J. Sun, Y. Yang, Y. Zhang, and Z. Liu, “Temperature-triggered chemical switching growth of in-plane and vertically stacked graphene-boron nitride heterostructures,” Nat. Commun. 6(1), 6835 (2015).
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K. Chen, X. Wan, J. Wen, W. Xie, Z. Kang, X. Zeng, H. Chen, and J. B. Xu, “Electronic properties of MoS2-WS2 heterostructures synthesized with two-step lateral epitaxial strategy,” ACS Nano 9(10), 9868–9876 (2015).
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Y. Yu, S. Hu, L. Su, L. Huang, Y. Liu, Z. Jin, A. A. Purezky, D. B. Geohegan, K. W. Kim, Y. Zhang, and L. Cao, “Equally efficient interlayer exciton relaxation and improved absorption in epitaxial and nonepitaxial MoS2/WS2 heterostructures,” Nano Lett. 15(1), 486–491 (2015).
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Y. H. Lin, S. F. Lin, Y. C. Chi, C. L. Wu, C. H. Cheng, W. H. Tseng, J. H. He, C. I. Wu, C. K. Lee, and G. R. Lin, “Using n- and p-Type Bi2Te3 topological insulator nanoparticles to enable controlled femtosecond mode-locking of fiber lasers,” ACS Photonics 2(4), 481–490 (2015).
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J. Ma, S. Lu, Z. Guo, X. Xu, H. Zhang, D. Tang, and D. Fan, “Few-layer black phosphorus based saturable absorber mirror for pulsed solid-state lasers,” Opt. Express 23(17), 22643–22648 (2015).
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H. R. Mu, S. H. Lin, Z. C. Wang, S. Xiao, P. F. Li, Y. Chen, H. Zhang, H. F. Bao, S. P. Lau, C. X. Pan, D. Y. Fan, and Q. L. Bao, “Pulsed lasers: black phosphorus-polymer composites for pulsed lasers,” Adv. Opt. Mater. 3(10), 1447–1453 (2015).
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C. Janisch, Y. Wang, D. Ma, N. Mehta, A. L. Elías, N. Perea-López, M. Terrones, V. Crespi, and Z. Liu, “Extraordinary second harmonic generation in tungsten disulfide monolayers,” Sci. Rep. 4(1), 5530 (2015).
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J. Kang, H. Sahin, and F. M. Peeters, “Tuning carrier confinement in MoS2 /WS2 lateral heterostructure,” J. Phys. Chem. C 119(17), 9580–9586 (2015).
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Y. Li, N. Dong, S. Zhang, X. Zhang, Y. Feng, K. Wang, L. Zhang, and J. Wang, “Giant two-photon absorption in monolayer MoS2,” Laser Photonics Rev. 9(4), 427–434 (2015).
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F. Schwierz, J. Pezoldt, and R. Granzner, “Two-dimensional materials and their prospects in transistor electronics,” Nanoscale 7(18), 8261–8283 (2015).
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2014 (12)

X. Hong, J. Kim, S. F. Shi, Y. Zhang, C. Jin, Y. Sun, S. Tongay, J. Wu, Y. Zhang, and F. Wang, “Ultrafast charge transfer in atomically thin MoS₂/WS₂ heterostructures,” Nat. Nanotechnol. 9(9), 682–686 (2014).
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N. J. Huo, J. Kang, Z. M. Wei, S. S. Li, J. B. Li, and S. H. Wei, “Novel and enhanced optoelectronic performances of multilayer MoS2 -WS2 heterostructure transistors,” Adv. Funct. Mater. 24(44), 7025–7031 (2014).
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F. N. Xia, H. Wang, D. Xiao, M. Dubey, and A. Ramasubramaniam, “Two-dimensional material nanophotonics,” Nat. Photonics 8(12), 899–907 (2014).
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F. Xia, H. Wang, and Y. Jia, “Rediscovering black phosphorus as an anisotropic layered material for optoelectronics and electronics,” Nat. Commun. 5(1), 4458 (2014).
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S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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A. Mishchenko, J. S. Tu, Y. Cao, R. V. Gorbachev, J. R. Wallbank, M. T. Greenaway, V. E. Morozov, S. V. Morozov, M. J. Zhu, S. L. Wong, F. Withers, C. R. Woods, Y. J. Kim, K. Watanabe, T. Taniguchi, E. E. Vdovin, O. Makarovsky, T. M. Fromhold, V. I. Fal’ko, A. K. Geim, L. Eaves, and K. S. Novoselov, “Twist-controlled resonant tunnelling in graphene/boron nitride/graphene heterostructures,” Nat. Nanotechnol. 9(10), 808–813 (2014).
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H. Liu, X. W. Zheng, M. Liu, N. Zhao, A. P. Luo, Z. C. Luo, W. C. Xu, H. Zhang, C. J. Zhao, and S. C. Wen, “Femtosecond pulse generation from a topological insulator mode-locked fiber laser,” Opt. Express 22(6), 6868–6873 (2014).
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J. Sotor, G. Sobon, W. Macherzynski, P. Paletko, K. Grodecki, and K. M. Abramski, “Mode-locking in Er-doped fiber laser based on mechanically exfoliated Sb2Te3 saturable absorber,” Opt. Mater. Express 4(1), 1–6 (2014).
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S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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R. Khazaeizhad, S. H. Kassani, H. Jeong, D. I. Yeom, and K. Oh, “Mode-locking of Er-doped fiber laser using a multilayer MoS2 thin film as a saturable absorber in both anomalous and normal dispersion regimes,” Opt. Express 22(19), 23732–23742 (2014).
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M. Liu, X. W. Zheng, Y. L. Qi, H. Liu, A. P. Luo, Z. C. Luo, W. C. Xu, C. J. Zhao, and H. Zhang, “Microfiber-based few-layer MoS2 saturable absorber for 2.5 GHz passively harmonic mode-locked fiber laser,” Opt. Express 22(19), 22841–22846 (2014).
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H. Zhang, S. B. Lu, J. Zheng, J. Du, S. C. Wen, D. Y. Tang, and K. P. Loh, “Molybdenum disulfide (MoS2) as a broadband saturable absorber for ultra-fast photonics,” Opt. Express 22(6), 7249–7260 (2014).
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2013 (3)

G. H. Han, J. A. Rodríguez-Manzo, C. W. Lee, N. J. Kybert, M. B. Lerner, Z. J. Qi, E. N. Dattoli, A. M. Rappe, M. Drndic, and A. T. Johnson, “Continuous growth of hexagonal graphene and boron nitride in-plane heterostructures by atmospheric pressure chemical vapor deposition,” ACS Nano 7(11), 10129–10138 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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2012 (2)

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photonics J. 4(3), 869–876 (2012).
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Q. H. Wang, K. Kalantar-Zadeh, A. Kis, J. N. Coleman, and M. S. Strano, “Electronics and optoelectronics of two-dimensional transition metal dichalcogenides,” Nat. Nanotechnol. 7(11), 699–712 (2012).
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2011 (1)

Q. Bao, H. Zhang, B. Wang, Z. Ni, C. H. Y. X. Lim, Y. Wang, D. Y. Tang, and K. P. Loh, “Broadband graphene polarizer,” Nat. Photonics 5(7), 411–415 (2011).
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2010 (1)

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics 4(9), 611–622 (2010).
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2007 (1)

A. K. Geim and K. S. Novoselov, “The rise of graphene,” Nat. Mater. 6(3), 183–191 (2007).
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1969 (1)

J. A. Wilson and A. D. Yoffe, “The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties,” Adv. Phys. 18(73), 193–335 (1969).
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Abramski, K. M.

Baek, J.

J. Baek, D. M. Yin, N. Liu, I. Omkaram, C. Jung, H. Im, S. Hong, S. M. Kim, Y. K. Hong, J. Hur, Y. Yoon, and S. Kim, “A highly sensitive chemical gas detecting transistor based on highly crystalline CVD-grown MoSe2 films,” Nano Res. 10(6), 1861–1871 (2017).
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Bao, H. F.

H. R. Mu, S. H. Lin, Z. C. Wang, S. Xiao, P. F. Li, Y. Chen, H. Zhang, H. F. Bao, S. P. Lau, C. X. Pan, D. Y. Fan, and Q. L. Bao, “Pulsed lasers: black phosphorus-polymer composites for pulsed lasers,” Adv. Opt. Mater. 3(10), 1447–1453 (2015).
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Bao, Q.

Bao, Q. L.

X. T. Jiang, S. X. Liu, W. Y. Liang, S. J. Luo, Z. L. He, Y. Q. Ge, H. D. Wang, R. Cao, F. Zhang, Q. Wen, J. Q. Li, Q. L. Bao, D. Y. Fan, and H. Zhang, “Broadband nonlinear photonics in few-layer MXene Ti3C2Tx (T= F, O, or OH),” Laser Photonics Rev. 12(2), 1700229 (2018).
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H. R. Mu, S. H. Lin, Z. C. Wang, S. Xiao, P. F. Li, Y. Chen, H. Zhang, H. F. Bao, S. P. Lau, C. X. Pan, D. Y. Fan, and Q. L. Bao, “Pulsed lasers: black phosphorus-polymer composites for pulsed lasers,” Adv. Opt. Mater. 3(10), 1447–1453 (2015).
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Blau, W. J.

K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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Bonaccorso, F.

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics 4(9), 611–622 (2010).
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Cao, G. Z.

Cao, L.

Y. Yu, S. Hu, L. Su, L. Huang, Y. Liu, Z. Jin, A. A. Purezky, D. B. Geohegan, K. W. Kim, Y. Zhang, and L. Cao, “Equally efficient interlayer exciton relaxation and improved absorption in epitaxial and nonepitaxial MoS2/WS2 heterostructures,” Nano Lett. 15(1), 486–491 (2015).
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Cao, R.

X. T. Jiang, S. X. Liu, W. Y. Liang, S. J. Luo, Z. L. He, Y. Q. Ge, H. D. Wang, R. Cao, F. Zhang, Q. Wen, J. Q. Li, Q. L. Bao, D. Y. Fan, and H. Zhang, “Broadband nonlinear photonics in few-layer MXene Ti3C2Tx (T= F, O, or OH),” Laser Photonics Rev. 12(2), 1700229 (2018).
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Cao, Y.

A. Mishchenko, J. S. Tu, Y. Cao, R. V. Gorbachev, J. R. Wallbank, M. T. Greenaway, V. E. Morozov, S. V. Morozov, M. J. Zhu, S. L. Wong, F. Withers, C. R. Woods, Y. J. Kim, K. Watanabe, T. Taniguchi, E. E. Vdovin, O. Makarovsky, T. M. Fromhold, V. I. Fal’ko, A. K. Geim, L. Eaves, and K. S. Novoselov, “Twist-controlled resonant tunnelling in graphene/boron nitride/graphene heterostructures,” Nat. Nanotechnol. 9(10), 808–813 (2014).
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Chen, B.

X. Zhang, S. Zhang, B. Chen, H. Wang, K. Wu, Y. Chen, J. Fan, S. Qi, X. Cui, L. Zhang, and J. Wang, “Direct synthesis of large-scale hierarchical MoS2 films nanostructured with orthogonally oriented vertically and horizontally aligned layers,” Nanoscale 8(1), 431–439 (2016).
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Chen, H.

W. Liu, M. Liu, J. Yin, H. Chen, W. Lu, S. Fang, H. Teng, M. Lei, P. Yan, and Z. Wei, “Tungsten diselenide for all-fiber lasers with the chemical vapor deposition method,” Nanoscale 10(17), 7971–7977 (2018).
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J. Yin, H. Chen, W. Lu, M. Liu, I. Ling Li, M. Zhang, W. Zhang, J. Wang, Z. Xu, P. Yan, W. Liu, and S. Ruan, “Large-area and highly crystalline MoSe2 for optical modulator,” Nanotechnology 28(48), 484001 (2017).
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H. Chen, J. Yin, J. Yang, X. Zhang, M. Liu, Z. Jiang, J. Wang, Z. Sun, T. Guo, W. Liu, and P. Yan, “Transition-metal dichalcogenides heterostructure saturable absorbers for ultrafast photonics,” Opt. Lett. 42(21), 4279–4282 (2017).
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H. Chen, L. Li, S. C. Ruan, T. Guo, and P. G. Yan, “Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers,” Opt. Eng. 55(8), 081318 (2016).
[Crossref]

W. Liu, L. Pang, H. Han, W. Tian, H. Chen, M. Lei, P. Yan, and Z. Wei, “70-fs mode-locked erbium-doped fiber laser with topological insulator,” Sci. Rep. 6(1), 19997 (2016).
[Crossref] [PubMed]

K. Chen, X. Wan, J. Wen, W. Xie, Z. Kang, X. Zeng, H. Chen, and J. B. Xu, “Electronic properties of MoS2-WS2 heterostructures synthesized with two-step lateral epitaxial strategy,” ACS Nano 9(10), 9868–9876 (2015).
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P. G. Yan, A. J. Liu, Y. S. Chen, H. Chen, S. C. Ruan, C. Y. Guo, S. F. Chen, I. L. Li, H. P. Yang, J. G. Hu, and G. Z. Cao, “Microfiber-based WS2-film saturable absorber for ultra-fast photonics,” Opt. Mater. Express 5(3), 479–489 (2015).
[Crossref]

Chen, J.

Chen, K.

K. Chen, X. Wan, J. Wen, W. Xie, Z. Kang, X. Zeng, H. Chen, and J. B. Xu, “Electronic properties of MoS2-WS2 heterostructures synthesized with two-step lateral epitaxial strategy,” ACS Nano 9(10), 9868–9876 (2015).
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Chen, P.

J. Zhang, J. Wang, P. Chen, Y. Sun, S. Wu, Z. Jia, X. Lu, H. Yu, W. Chen, J. Zhu, G. Xie, R. Yang, D. Shi, X. Xu, J. Xiang, K. Liu, and G. Zhang, “Observation of strong interlayer coupling in MoS2 /WS2 heterostructures,” Adv. Mater. 28(10), 1950–1956 (2016).
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Chen, S.

Chen, S. F.

Chen, W.

J. Zhang, J. Wang, P. Chen, Y. Sun, S. Wu, Z. Jia, X. Lu, H. Yu, W. Chen, J. Zhu, G. Xie, R. Yang, D. Shi, X. Xu, J. Xiang, K. Liu, and G. Zhang, “Observation of strong interlayer coupling in MoS2 /WS2 heterostructures,” Adv. Mater. 28(10), 1950–1956 (2016).
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Chen, Y.

X. Zhang, S. Zhang, B. Chen, H. Wang, K. Wu, Y. Chen, J. Fan, S. Qi, X. Cui, L. Zhang, and J. Wang, “Direct synthesis of large-scale hierarchical MoS2 films nanostructured with orthogonally oriented vertically and horizontally aligned layers,” Nanoscale 8(1), 431–439 (2016).
[Crossref] [PubMed]

H. R. Mu, S. H. Lin, Z. C. Wang, S. Xiao, P. F. Li, Y. Chen, H. Zhang, H. F. Bao, S. P. Lau, C. X. Pan, D. Y. Fan, and Q. L. Bao, “Pulsed lasers: black phosphorus-polymer composites for pulsed lasers,” Adv. Opt. Mater. 3(10), 1447–1453 (2015).
[Crossref]

J. Du, Q. Wang, G. Jiang, C. Xu, C. Zhao, Y. Xiang, Y. Chen, S. Wen, and H. Zhang, “Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction,” Sci. Rep. 4(1), 6346 (2015).
[Crossref] [PubMed]

Y. Chen, G. Jiang, S. Chen, Z. Guo, X. Yu, C. Zhao, H. Zhang, Q. Bao, S. Wen, D. Tang, and D. Fan, “Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operation,” Opt. Express 23(10), 12823–12833 (2015).
[Crossref] [PubMed]

T. Gao, X. Song, H. Du, Y. Nie, Y. Chen, Q. Ji, J. Sun, Y. Yang, Y. Zhang, and Z. Liu, “Temperature-triggered chemical switching growth of in-plane and vertically stacked graphene-boron nitride heterostructures,” Nat. Commun. 6(1), 6835 (2015).
[Crossref] [PubMed]

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
[Crossref] [PubMed]

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
[Crossref] [PubMed]

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photonics J. 4(3), 869–876 (2012).
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Chen, Y. S.

Chen, Y. X.

L. Lu, Z. M. Liang, L. M. Wu, Y. X. Chen, Y. F. Song, S. C. Dhanabalan, J. S. Ponraj, B. Q. Dong, Y. J. Xiang, F. Xing, D. Y. Fan, and H. Zhang, “Few‐layer bismuthene: sonochemical exfoliation, nonlinear optics and applications for ultrafast photonics with enhanced stability,” Laser Photonics Rev. 12(1), 1700221 (2018).
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Cheng, C. H.

Y. H. Lin, S. F. Lin, Y. C. Chi, C. L. Wu, C. H. Cheng, W. H. Tseng, J. H. He, C. I. Wu, C. K. Lee, and G. R. Lin, “Using n- and p-Type Bi2Te3 topological insulator nanoparticles to enable controlled femtosecond mode-locking of fiber lasers,” ACS Photonics 2(4), 481–490 (2015).
[Crossref]

Cheng, H.

D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
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J. Lee, J. Park, J. Koo, Y. M. Jhon, and J. H. Lee, “Harmonically mode-locked femtosecond fiber laser using non-uniform, WS2-particle deposited side-polished fiber,” J. Opt. 18(3), 035502 (2016).
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J. Koo, Y. I. Jhon, J. Park, J. Lee, Y. M. Jhon, and J. H. Lee, “Near-infrared saturable absorption of defective bulk-structured WTe2 for femtosecond laser mode-locking,” Adv. Funct. Mater. 26(41), 7454–7461 (2016).
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J. Koo, J. Park, J. Lee, Y. M. Jhon, and J. H. Lee, “Femtosecond harmonic mode-locking of a fiber laser at 3.27 GHz using a bulk-like, MoSe2-based saturable absorber,” Opt. Express 24(10), 10575–10589 (2016).
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Y. H. Lin, S. F. Lin, Y. C. Chi, C. L. Wu, C. H. Cheng, W. H. Tseng, J. H. He, C. I. Wu, C. K. Lee, and G. R. Lin, “Using n- and p-Type Bi2Te3 topological insulator nanoparticles to enable controlled femtosecond mode-locking of fiber lasers,” ACS Photonics 2(4), 481–490 (2015).
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H. R. Mu, S. H. Lin, Z. C. Wang, S. Xiao, P. F. Li, Y. Chen, H. Zhang, H. F. Bao, S. P. Lau, C. X. Pan, D. Y. Fan, and Q. L. Bao, “Pulsed lasers: black phosphorus-polymer composites for pulsed lasers,” Adv. Opt. Mater. 3(10), 1447–1453 (2015).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photonics J. 4(3), 869–876 (2012).
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Zhang, L.

X. Zhang, S. Zhang, B. Chen, H. Wang, K. Wu, Y. Chen, J. Fan, S. Qi, X. Cui, L. Zhang, and J. Wang, “Direct synthesis of large-scale hierarchical MoS2 films nanostructured with orthogonally oriented vertically and horizontally aligned layers,” Nanoscale 8(1), 431–439 (2016).
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Y. Li, N. Dong, S. Zhang, X. Zhang, Y. Feng, K. Wang, L. Zhang, and J. Wang, “Giant two-photon absorption in monolayer MoS2,” Laser Photonics Rev. 9(4), 427–434 (2015).
[Crossref]

K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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Zhang, M.

J. Yin, H. Chen, W. Lu, M. Liu, I. Ling Li, M. Zhang, W. Zhang, J. Wang, Z. Xu, P. Yan, W. Liu, and S. Ruan, “Large-area and highly crystalline MoSe2 for optical modulator,” Nanotechnology 28(48), 484001 (2017).
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Zhang, S.

X. Zhang, S. Zhang, Y. Xie, J. Huang, L. Wang, Y. Cui, and J. Wang, “Tailoring the nonlinear optical performance of two-dimensional MoS2 nanofilms via defect engineering,” Nanoscale 10(37), 17924–17932 (2018).
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D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
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X. Zhang, S. Zhang, B. Chen, H. Wang, K. Wu, Y. Chen, J. Fan, S. Qi, X. Cui, L. Zhang, and J. Wang, “Direct synthesis of large-scale hierarchical MoS2 films nanostructured with orthogonally oriented vertically and horizontally aligned layers,” Nanoscale 8(1), 431–439 (2016).
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Y. Li, N. Dong, S. Zhang, X. Zhang, Y. Feng, K. Wang, L. Zhang, and J. Wang, “Giant two-photon absorption in monolayer MoS2,” Laser Photonics Rev. 9(4), 427–434 (2015).
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J. Yin, H. Chen, W. Lu, M. Liu, I. Ling Li, M. Zhang, W. Zhang, J. Wang, Z. Xu, P. Yan, W. Liu, and S. Ruan, “Large-area and highly crystalline MoSe2 for optical modulator,” Nanotechnology 28(48), 484001 (2017).
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D. Mao, X. She, B. Du, D. Yang, W. Zhang, K. Song, X. Cui, B. Jiang, T. Peng, and J. Zhao, “Erbium-doped fiber laser passively mode locked with few-layer WSe2/MoSe2 nanosheets,” Sci. Rep. 6(1), 23583 (2016).
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D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
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D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS₂ saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
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Zhang, X.

X. Zhang, S. Zhang, Y. Xie, J. Huang, L. Wang, Y. Cui, and J. Wang, “Tailoring the nonlinear optical performance of two-dimensional MoS2 nanofilms via defect engineering,” Nanoscale 10(37), 17924–17932 (2018).
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Y. Li, N. Dong, S. Zhang, X. Zhang, Y. Feng, K. Wang, L. Zhang, and J. Wang, “Giant two-photon absorption in monolayer MoS2,” Laser Photonics Rev. 9(4), 427–434 (2015).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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X. Hong, J. Kim, S. F. Shi, Y. Zhang, C. Jin, Y. Sun, S. Tongay, J. Wu, Y. Zhang, and F. Wang, “Ultrafast charge transfer in atomically thin MoS₂/WS₂ heterostructures,” Nat. Nanotechnol. 9(9), 682–686 (2014).
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X. Hong, J. Kim, S. F. Shi, Y. Zhang, C. Jin, Y. Sun, S. Tongay, J. Wu, Y. Zhang, and F. Wang, “Ultrafast charge transfer in atomically thin MoS₂/WS₂ heterostructures,” Nat. Nanotechnol. 9(9), 682–686 (2014).
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Y. Chen, G. Jiang, S. Chen, Z. Guo, X. Yu, C. Zhao, H. Zhang, Q. Bao, S. Wen, D. Tang, and D. Fan, “Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operation,” Opt. Express 23(10), 12823–12833 (2015).
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J. Du, Q. Wang, G. Jiang, C. Xu, C. Zhao, Y. Xiang, Y. Chen, S. Wen, and H. Zhang, “Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction,” Sci. Rep. 4(1), 6346 (2015).
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Zhao, C. J.

Zhao, J.

D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
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D. Mao, X. She, B. Du, D. Yang, W. Zhang, K. Song, X. Cui, B. Jiang, T. Peng, and J. Zhao, “Erbium-doped fiber laser passively mode locked with few-layer WSe2/MoSe2 nanosheets,” Sci. Rep. 6(1), 23583 (2016).
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D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS₂ saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
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Zhao, M.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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Zhao, Q.

K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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Zheng, X. W.

Zhong, M.

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ACS Nano (4)

K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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K. Wang, J. Wang, J. Fan, M. Lotya, A. O’Neill, D. Fox, Y. Feng, X. Zhang, B. Jiang, Q. Zhao, H. Zhang, J. N. Coleman, L. Zhang, and W. J. Blau, “Ultrafast saturable absorption of two-dimensional MoS2 nanosheets,” ACS Nano 7(10), 9260–9267 (2013).
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ACS Photonics (1)

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S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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J. Zhang, J. Wang, P. Chen, Y. Sun, S. Wu, Z. Jia, X. Lu, H. Yu, W. Chen, J. Zhu, G. Xie, R. Yang, D. Shi, X. Xu, J. Xiang, K. Liu, and G. Zhang, “Observation of strong interlayer coupling in MoS2 /WS2 heterostructures,” Adv. Mater. 28(10), 1950–1956 (2016).
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Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photonics J. 4(3), 869–876 (2012).
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Nanotechnology (3)

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[Crossref]

Q. Bao, H. Zhang, B. Wang, Z. Ni, C. H. Y. X. Lim, Y. Wang, D. Y. Tang, and K. P. Loh, “Broadband graphene polarizer,” Nat. Photonics 5(7), 411–415 (2011).
[Crossref]

Opt. Eng. (1)

H. Chen, L. Li, S. C. Ruan, T. Guo, and P. G. Yan, “Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers,” Opt. Eng. 55(8), 081318 (2016).
[Crossref]

Opt. Express (10)

K. Wu, X. Zhang, J. Wang, X. Li, and J. Chen, “WS2 as a saturable absorber for ultrafast photonic applications of mode-locked and Q-switched lasers,” Opt. Express 23(9), 11453–11461 (2015).
[Crossref] [PubMed]

Y. Chen, G. Jiang, S. Chen, Z. Guo, X. Yu, C. Zhao, H. Zhang, Q. Bao, S. Wen, D. Tang, and D. Fan, “Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operation,” Opt. Express 23(10), 12823–12833 (2015).
[Crossref] [PubMed]

J. Sotor, I. Pasternak, A. Krajewska, W. Strupinski, and G. Sobon, “Sub-90 fs a stretched-pulse mode-locked fiber laser based on a graphene saturable absorber,” Opt. Express 23(21), 27503–27508 (2015).
[Crossref] [PubMed]

H. Liu, X. W. Zheng, M. Liu, N. Zhao, A. P. Luo, Z. C. Luo, W. C. Xu, H. Zhang, C. J. Zhao, and S. C. Wen, “Femtosecond pulse generation from a topological insulator mode-locked fiber laser,” Opt. Express 22(6), 6868–6873 (2014).
[Crossref] [PubMed]

M. Liu, X. W. Zheng, Y. L. Qi, H. Liu, A. P. Luo, Z. C. Luo, W. C. Xu, C. J. Zhao, and H. Zhang, “Microfiber-based few-layer MoS2 saturable absorber for 2.5 GHz passively harmonic mode-locked fiber laser,” Opt. Express 22(19), 22841–22846 (2014).
[Crossref] [PubMed]

H. Zhang, S. B. Lu, J. Zheng, J. Du, S. C. Wen, D. Y. Tang, and K. P. Loh, “Molybdenum disulfide (MoS2) as a broadband saturable absorber for ultra-fast photonics,” Opt. Express 22(6), 7249–7260 (2014).
[Crossref] [PubMed]

R. Khazaeizhad, S. H. Kassani, H. Jeong, D. I. Yeom, and K. Oh, “Mode-locking of Er-doped fiber laser using a multilayer MoS2 thin film as a saturable absorber in both anomalous and normal dispersion regimes,” Opt. Express 22(19), 23732–23742 (2014).
[Crossref] [PubMed]

D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS₂ saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
[Crossref] [PubMed]

J. Koo, J. Park, J. Lee, Y. M. Jhon, and J. H. Lee, “Femtosecond harmonic mode-locking of a fiber laser at 3.27 GHz using a bulk-like, MoSe2-based saturable absorber,” Opt. Express 24(10), 10575–10589 (2016).
[Crossref] [PubMed]

J. Ma, S. Lu, Z. Guo, X. Xu, H. Zhang, D. Tang, and D. Fan, “Few-layer black phosphorus based saturable absorber mirror for pulsed solid-state lasers,” Opt. Express 23(17), 22643–22648 (2015).
[Crossref] [PubMed]

Opt. Lett. (2)

Opt. Mater. Express (2)

Photon. Res. (2)

Sci. Rep. (5)

C. Janisch, Y. Wang, D. Ma, N. Mehta, A. L. Elías, N. Perea-López, M. Terrones, V. Crespi, and Z. Liu, “Extraordinary second harmonic generation in tungsten disulfide monolayers,” Sci. Rep. 4(1), 5530 (2015).
[Crossref] [PubMed]

J. Li, H. Luo, B. Zhai, R. Lu, Z. Guo, H. Zhang, and Y. Liu, “Black phosphorus: a two-dimension saturable absorption material for mid-infrared Q-switched and mode-locked fiber lasers,” Sci. Rep. 6(1), 30361 (2016).
[Crossref] [PubMed]

W. Liu, L. Pang, H. Han, W. Tian, H. Chen, M. Lei, P. Yan, and Z. Wei, “70-fs mode-locked erbium-doped fiber laser with topological insulator,” Sci. Rep. 6(1), 19997 (2016).
[Crossref] [PubMed]

D. Mao, X. She, B. Du, D. Yang, W. Zhang, K. Song, X. Cui, B. Jiang, T. Peng, and J. Zhao, “Erbium-doped fiber laser passively mode locked with few-layer WSe2/MoSe2 nanosheets,” Sci. Rep. 6(1), 23583 (2016).
[Crossref] [PubMed]

J. Du, Q. Wang, G. Jiang, C. Xu, C. Zhao, Y. Xiang, Y. Chen, S. Wen, and H. Zhang, “Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction,” Sci. Rep. 4(1), 6346 (2015).
[Crossref] [PubMed]

Small (1)

D. Mao, B. Du, D. Yang, S. Zhang, Y. Wang, W. Zhang, X. She, H. Cheng, H. Zeng, and J. Zhao, “Nonlinear saturable absorption of liquid-exfoliated molybdenum/tungsten ditelluride nanosheets,” Small 12(11), 1489–1497 (2016).
[Crossref] [PubMed]

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Figures (6)

Fig. 1
Fig. 1 Atomic and electronic structure of the MoS2-WS2 heterostructure. (a) Top and side views of the MoS2-WS2 heterostructure, the dashed rectangle denotes the primitive cell. (b), (c) and (d) are band structures of MoS2-WS2 heterostructure, monolayer MoS2 and monolayer WS2, respectively. Here, the fermi level is set to be zero, and the orange line denotes valence-band maximum for the holes and conduction-band minimum for the electrons. Besides, red points project the contribution from the MoS2 in (b). (e) is the band alignment of the MoS2-WS2 heterostructure. The energy levels of MoS2 and monolayer WS2 slabs are shown in both sides. Here, the monolayer MoS2, monolayer WS2, and MoS2-WS2 heterostructure are considered.
Fig. 2
Fig. 2 SEM of the MoS2-WS2 heterostructure SA. (a) The surface morphology; (b) The thickness of heterostructure indicated by the lateral.
Fig. 3
Fig. 3 (a) The Raman spectra of the MoS2, WS2 and MoS2-WS2 heterostructure; (b) The nonlinear absorption of the MoS2-WS2 heterostructure SA.
Fig. 4
Fig. 4 Experimental device diagram of the passively mode-locked EDF laser employed with the MoS2-WS2 heterostructure SA.
Fig. 5
Fig. 5 The performance of the passively mode-locked EDF laser employed with the MoS2-WS2 heterostructure SA. (a) The optical spectrum located at 1560 nm with 3 dB spectral width of 24.4 nm; (b) The mode-locked pulse train; (c) The radio-frequency spectrum; (d) The symmetrical autocorrelation trace of mode-locked pulses.
Fig. 6
Fig. 6 The continuous monitoring of output power of the fiber laser.

Tables (2)

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Table 1 Band Gap (Eg), Effective Mass and Carrier Mobility (µ) of Monolayer and Heterostructure Materials

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Table 2 Comparisons of Mode-Locked Fiber Lasers Employed with Different SAs

Equations (1)

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μ= 2e 3 C 3 k B T | m* | 2 E 2 ,