Crystalline Phase Effects on the Nonlinear Optical Response of MoS2 and WS2 Nanosheets: Implications for Photonic and Optoelectronic Applications
| العنوان: | Crystalline Phase Effects on the Nonlinear Optical Response of MoS2 and WS2 Nanosheets: Implications for Photonic and Optoelectronic Applications |
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| المؤلفون: | Michalis Stavrou, Nikolaos Chazapis, Eleni Nikoli, Raul Arenal, Nikos Tagmatarchis, Stelios Couris |
| المساهمون: | Hellenic Foundation for Research and Innovation, Universidad de Zaragoza, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Gobierno de Aragón, European Commission, Diputación General de Aragón |
| المصدر: | ACS Applied Nano Materials. 5:16674-16686 |
| بيانات النشر: | American Chemical Society (ACS), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | General Materials Science |
| الوصف: | In the present work, some MoS2 and WS2 nanosheets were prepared and characterized. Depending on the preparation procedures, trigonal prismatic (2H) or octahedral (1T) coordination of the metal atoms was obtained, exhibiting metallic (1T) or semiconducting (2H) character. Both MoS2 and WS2 nanosheets were found exhibiting large nonlinear optical (NLO) responses, strongly dependent on their metallic (1T) or semiconducting (2H) character. Therefore, the semiconducting character of MoS2 and WS2 exhibits positive nonlinear absorption and strong self-focusing behavior, while their metallic character counterparts exhibit strong negative nonlinear absorption and important self-defocusing behavior. In addition, the semiconducting MoS2 and WS2 were found exhibiting important and very broadband optical limiting (OL) action extending from 450 to 1750 nm. Therefore, by selecting the crystalline phase of the nanosheets, that is, their semiconduction/metallic character, their NLO response can be greatly modulated. The results of the present work demonstrate unambiguously that the control of the crystalline phase of MoS2 and WS2 provides an efficient strategy for 2D nanostructures with custom-made NLO properties for specific optoelectronic and photonic applications such as OL, saturable absorption, and optical switching. M.S. acknowledges support from the Hellenic Foundation for Research and Innovation (HFRI) under the HFRI PhD Fellowship grant (number: 83656). Financial support to N.T. by the Hellenic Foundation for Research and Innovation HFRI under the “2nd Call for HFRI Research Projects to support Faculty Members and Researchers” (Project number: 2482) is acknowledged. TEM studies were performed in Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Spain. R.A. acknowledges support from Spanish MICINN (PID2019-104739GB–100/AEI/10.13039/501100011033), Government of Aragon (projects DGA E13-20R), and from EU H2020 “ESTEEM3” (Grant number 823717) and Graphene Flagship (Grant number 881603). |
| تدمد: | 2574-0970 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d1a40a1ea017666b0274c0758d1fa0f https://doi.org/10.1021/acsanm.2c03709 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....3d1a40a1ea017666b0274c0758d1fa0f |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 25740970 |
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