• Photonic Sensors
  • Vol. 9, Issue 1, 1 (2019)
Yizhi WANG1, Zhongyuan GUO2, Jie YOU2、3, Zhen ZHANG4, Xin ZHENG2、3, and Xiangai CHENG1、2、*
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073,China
  • 3National Innovation Institute of Defense Technology, Academy of Military Sciences PLA China, Beijing 100010, China
  • 4State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi’an 710024, China
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    DOI: 10.1007/s13320-018-0514-9 Cite this Article
    Yizhi WANG, Zhongyuan GUO, Jie YOU, Zhen ZHANG, Xin ZHENG, Xiangai CHENG. Ultrafast Nonlinear Optical Excitation Behaviors of Mono- and Few-Layer Two Dimensional MoS2[J]. Photonic Sensors, 2019, 9(1): 1 Copy Citation Text show less

    Abstract

    The layered MoS2 has recently attracted significant attention for its excellent nonlinear optical properties. Here, the ultrafast nonlinear optical (NLO) absorption and excited carrier dynamics of layered MoS2 (monolayer, 3-4 layers, and 6-8 layers) are investigated via Z-scan and transient absorption spectra. Our experimental results reveal that NLO absorption coefficients of these MoS2 increase from -27 × 103cm/GW to -11 × 103cm/GW with more layers at 400-nm laserexcitation, while the values decrease from 2.0 × 103 cm/GW to 0.8 × 103 cm/GW at 800 nm. In addition, at high pump fluence, when the NLO response occurs, the results show that not only the reformation of the excitonic bands, but also the recovery time of NLO response decreases from 150 ps to 100 ps with an increasing number of layers, while the reductive energy of A excitonic band decreases from 191.7 meV to 51.1 meV. The intriguing NLO response of MoS2 provides excellent potentials for the next-generation optoelectronic and photonic devices.
    Yizhi WANG, Zhongyuan GUO, Jie YOU, Zhen ZHANG, Xin ZHENG, Xiangai CHENG. Ultrafast Nonlinear Optical Excitation Behaviors of Mono- and Few-Layer Two Dimensional MoS2[J]. Photonic Sensors, 2019, 9(1): 1
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