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Vertically standing PtSe2 film: a saturable absorber for a passively mode-locked Nd:LuVO4 laser

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Abstract

The novel vertically standing PtSe2 film on transparent quartz was prepared by selenization of platinum film deposited by the magnetron sputtering method, and an Nd:LuVO4 passively mode-locked solid-state laser was realized by using the fabricated PtSe2 film as a saturable absorber. The X-ray diffraction pattern and Raman spectrum of the film indicate its good crystallinity with a layered structure. The thickness of PtSe2 film is measured to be 24 nm according to the cross-section height profile of the atomic force microscope image. High-resolution transmission electron microscopy images clearly demonstrate its vertically standing structure with an interlayer distance of 0.54 nm along the c-axis direction. The modulation depth (ΔT) and saturation fluence (?s) of PtSe2 film are measured to be 12.6% and 17.1 μJ/cm2, respectively. The obtained mode-locked laser spectrum has a central wavelength of 1066.573 nm, with a 3 dB bandwidth of 0.106 nm. The transform limited pulse width of the mode-locked laser was calculated to be 15.8 ps. A maximum average output power of 180 mW with a working repetition rate of 61.3 MHz is obtained. To the best of our knowledge, this is the first report of the generation of ultrafast mode-locked laser pulses by using layered PtSe2 as a saturable absorber.

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DOI:10.1364/prj.6.000750

基金项目:National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61705044); One-Hundred Young Talents Program of Guangdong University of Technology (GDUT)10.13039/501100008326 (220413145); Research Grants Council, University Grants Committee (RGC, UGC)10.13039/501100002920 (GRF 152109/16E PolyU B-Q52T); Hong Kong Polytechnic University (PolyU)10.13039/501100004377 (G-YBVG).

收稿日期:2018-04-17

录用日期:2018-05-22

网络出版日期:2018-05-22

作者单位    点击查看

Lili Tao:School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Xiaowen Huang:Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Junshan He:School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Yajun Lou:School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Longhui Zeng:Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Yonghui Li:School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Hui Long:Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Jingbo Li:School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Ling Zhang:Laboratory of All-Solid-State Light Sources, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, Chinae-mail: zhangling@semi.ac.cn
Yuen Hong Tsang:Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Chinae-mail: yuen.tsang@polyu.edu.hk

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引用该论文

Lili Tao, Xiaowen Huang, Junshan He, Yajun Lou, Longhui Zeng, Yonghui Li, Hui Long, Jingbo Li, Ling Zhang, and Yuen Hong Tsang, "Vertically standing PtSe2 film: a saturable absorber for a passively mode-locked Nd:LuVO4 laser," Photonics Research 6(7), 750-755 (2018)

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