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Atomic-scale structure and nonlinear optical absorption of two-dimensional GeS

2024-07-10Artigo científico Acesso aberto
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dc.contributor.authorZhang, Jijun
dc.contributor.authorSun, Rong
dc.contributor.authorGe, Yanqi
dc.contributor.authorWang, Jingyi
dc.contributor.authorWang, Zexuan
dc.contributor.authorMeng, Lijian
dc.contributor.authorDeepak, Francis Leonard
dc.contributor.authorZhang, Min
dc.contributor.authorYin, Peng
dc.contributor.authorCheng, Faliang
dc.contributor.authorWang, Zhiming
dc.contributor.authorWang, Zhongchang
dc.date.accessioned2024-01-25T09:27:33Z
dc.date.available2024-01-25T09:27:33Z
dc.date.issued2024-07-10
dc.description.abstractGermanium sulfide (GeS) represents a typical two-dimensional (2D) material that exhibits fascinating prospects for optoelectronic applications, and the understanding of its atomic-scale structure is crucial to tailoring its desired photonic properties. Here, we systematically investigate the atomic-scale structure of GeS and its nonlinear optical absorption properties. The GeS nanosheets of a thickness of 2, 3 layers exhibit high optical nonlinearity with an effective nonlinear coefficient of -0.318 cm/GW, larger than that of black phosphorous by three orders, which can be applied for the generation of ultrashort-pulse lasers. We fabricate a Tm-doped passively mode-locked fiber laser based on a GeS saturable absorber and achieve a fundamental repetition rate of 9.7 MHz and a pulse duration as short as 1.56 ps at ∼2 µm. These findings suggest that 2D GeS nanosheets could be an efficient nonlinear material in the mid-infrared waveband with potential applications in integrated nonlinear photonics.en
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jmst.2023.10.056pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/24657
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.titleAtomic-scale structure and nonlinear optical absorption of two-dimensional GeSpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage194pt_PT
oaire.citation.startPage188pt_PT
oaire.citation.titleJournal of Materials Science & Technologypt_PT
oaire.citation.volume187pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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