Large-scale monolayer molybdenum disulfide (MoS 2 ) for mid-infrared photonics

Nanophotonics

article

Han Pan¹  Dechun Li¹  Hongwei Chu¹  Zhongben Pan²  Shengzhi Zhao¹  Ming Yang³  Jianwei Chai³  Shijie Wang³  Dongzhi Chi³ 

[1] School of Information Science and Engineering, Shandong University;Institute of Chemical Materials, China Academy of Engineering Physics;Institute of Materials Research and Engineering

关键词: DFT calculation;    MIR pulsed laser;    monolayer MoS2;    nonlinear optical properties;    saturable absorber;    Z-scan measurement;   

DOI  :  10.1515/nanoph-2020-0331

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Mid-infrared (MIR) photonics has attracted tremendous interest because of its broad applications at atmospheric windows. In this work, we report high-performance MIR photonics based on large-scale and good-quality monolayer molybdenum disulfide (MoS 2 ). The open-aperture Z-scan measurement on the nonlinear saturable absorption features shows that the as-grown monolayer MoS 2 possesses a modulation depth of 26% and a low saturable intensity of 271 kW/cm 2 , enabling its application as an excellent saturable absorber for the MIR pulse generation. This is further evident by the measured high effective nonlinear absorption coefficient β eff (−16 cm/MW). In addition, the two-photon absorption coefficient and the nonlinear refractive index of monolayer MoS 2 are also determined by the closed-aperture Z-scan technology. As an application, we demonstrate a passively Q-switched Tm,Ho:CaLu 0.1 Gd 0.9 AlO 4 (Tm,Ho:CLGA) disordered crystal laser at 2.1 μm by using the monolayer MoS 2 as the saturable absorber for the first time, producing a minimum pulse width of 765 ns and a pulse repetition rate of 36 kHz. Our results demonstrate that large-scale monolayer MoS 2 is a promising candidate for the MIR photonic applications.

【 授权许可】

CC BY