Nanosecond and femtosecond lasers based on black arsenic-phosphorus alloys saturable absorber  

作　　者：Shengjun Huang Yiran Wang Jingliang He Xiancui Su Jie Liu 黄圣钧;王祎然;何京良;苏现翠;刘杰(Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device,School of Physics and Electronics,Shandong Normal University,Jinan 250358,China;Shandong Key Laboratory of Optical Communication Science and Technology,School of Physics Science and Information Technology,Liaocheng University,Liaocheng 252059,China;State Key Laboratory of Crystal Materials,Institute of Novel Semiconductors,Shandong University,Jinan 250100,China)

机构地区：[1]Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device,School of Physics and Electronics,Shandong Normal University,Jinan 250358,China [2]Shandong Key Laboratory of Optical Communication Science and Technology,School of Physics Science and Information Technology,Liaocheng University,Liaocheng 252059,China [3]State Key Laboratory of Crystal Materials,Institute of Novel Semiconductors,Shandong University,Jinan 250100,China

出　　处：《Chinese Optics Letters》2022年第2期106-110,共5页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(NSFC)(Nos.11974220 and 61905104).

摘　　要：In this paper, the high-repetition-rate passively Q-switched(PQS) and the femtosecond continuous-wave mode-locked(CWML) lasers are successfully obtained with 2 D black arsenic-phosphorus(b-As P) nanosheets as saturable absorber(SA) at 1 μm for the first time, to the best of our knowledge. The saturable absorption properties and ultrafast carrier dynamics of the 2 D b-As P SA are explored by Z-scan and pump-probe techniques. Moreover, according to the measurement of desired nonlinear optical characteristics of the relaxation time of 27 ps and the modulation depth of 7.14%, the PQS and CWML lasers are demonstrated with the highest repetition rate of 2.26 MHz in the PQS laser and the pulse width of 470 fs in the CWML laser. The results show 2 D b-As P SA has enormous potential for pulse modulation in solid-state bulk lasers.

关 键 词：ultrafast lasers mode-locked lasers passively Q-switched lasers NONLINEARITY 

分 类 号：TN248[电子电信—物理电子学]