The year 2019 marks the 10th anniversary of the first report of ultrafast fiber laser mode-locked by graphene.This result has had an important impact on ultrafast laser optics and continues to offer new horizons.Herei...The year 2019 marks the 10th anniversary of the first report of ultrafast fiber laser mode-locked by graphene.This result has had an important impact on ultrafast laser optics and continues to offer new horizons.Herein,we mainly review the linear and nonlinear photonic properties of two-dimensional(2D)materials,as well as their nonlinear applications in efficient passive mode-locking devices and ultrafast fiber lasers.Initial works and significant progress in this field,as well as new insights and challenges of 2D materials for ultrafast fiber lasers,are reviewed and analyzed.展开更多
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,...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-27×10^3cm/GW to -11×10^3cm/GW with more layers at 400-nm laser excitation,while the values decrease from 2.0×10^3cm/GW to 0.8×10^3cm/GW at 800nm.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 150ps to lOOps with an increasing number of layers,while the reductive energy of A excitonic band decreases from 191.TmeV to 51.1meV.The intriguing NLO response of MoS2 provides excellent potentials for the next-generation optoelectronic and photonic devices.展开更多
基金National Natural Science Foundation of China(11802339,11804387,11805276,61801498,61805282)China Postdoctoral Innovation Science Foundation(BX20180373)+5 种基金Scientific Researches Foundation of National University of Defense Technology(ZK16-03-59,ZK18-01-03,ZK18-03-22,ZK18-03-36)Natural Science Foundation of Hunan Province(2016JJ1021)Open Director Fund of State Key Laboratory of Pulsed Power Laser Technology(SKL2018ZR05)Open Research Fund of Hunan Provincial Key Laboratory of High Energy Technology(GNJGJS03)Opening Foundation of State Key Laboratory of Laser Interaction with Matter(SKLLIM1702)Youth Talent Lifting Project(17-JCJQ-QT-004)。
文摘The year 2019 marks the 10th anniversary of the first report of ultrafast fiber laser mode-locked by graphene.This result has had an important impact on ultrafast laser optics and continues to offer new horizons.Herein,we mainly review the linear and nonlinear photonic properties of two-dimensional(2D)materials,as well as their nonlinear applications in efficient passive mode-locking devices and ultrafast fiber lasers.Initial works and significant progress in this field,as well as new insights and challenges of 2D materials for ultrafast fiber lasers,are reviewed and analyzed.
文摘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-27×10^3cm/GW to -11×10^3cm/GW with more layers at 400-nm laser excitation,while the values decrease from 2.0×10^3cm/GW to 0.8×10^3cm/GW at 800nm.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 150ps to lOOps with an increasing number of layers,while the reductive energy of A excitonic band decreases from 191.TmeV to 51.1meV.The intriguing NLO response of MoS2 provides excellent potentials for the next-generation optoelectronic and photonic devices.
