Large-scale monolayer molybdenum disulfide (MoS2) for mid-infrared photonics
| Autor: | Pan Han, Chu Hongwei, Pan Zhongben, Zhao Shengzhi, Yang Ming, Chai Jianwei, Wang Shijie, Chi Dongzhi, Li Dechun |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Nanophotonics, Vol 9, Iss 16, Pp 4703-4710 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2192-8606 2192-8614 2020-0331 |
| DOI: | 10.1515/nanoph-2020-0331 |
| Popis: | 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 (MoS2). The open-aperture Z-scan measurement on the nonlinear saturable absorption features shows that the as-grown monolayer MoS2 possesses a modulation depth of 26% and a low saturable intensity of 271 kW/cm2, 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 βeff (−16 cm/MW). In addition, the two-photon absorption coefficient and the nonlinear refractive index of monolayer MoS2 are also determined by the closed-aperture Z-scan technology. As an application, we demonstrate a passively Q-switched Tm,Ho:CaLu0.1Gd0.9AlO4 (Tm,Ho:CLGA) disordered crystal laser at 2.1 μm by using the monolayer MoS2 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 MoS2 is a promising candidate for the MIR photonic applications. |
| Databáze: | Directory of Open Access Journals |
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