Facile synthesis of two-dimensional WS2 with reverse saturable absorption and nonlinear refraction properties in the PMMA matrix

Wei, Rongfei; Tian, Xiangling; Zhang, Hang; Hu, Zhongliang; He, Xin; Chen, Zhi; Chen, Qiuqun; Qiu, Jianrong

doi:10.1016/j.jallcom.2016.05.169

Cited by 25 publications

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References 41 publications

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“…The quantity 0 ( , ) q z t and the corresponding value of β are calculated directly from the following equation [24,25]: Under the irradiation of a high power laser, the absorption coefficient cannot be ignored and is determined according to the following formula:…”

Section: Methodsmentioning

confidence: 99%

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Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal

et al. 2017

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Abstract:In this work, using large-sized single crystals of high optical quality, the optical properties of Ba 2 TiSi 2 O 8 were systematically investigated, including transmission spectra, refractive indices and nonlinear absorption properties. The crystal exhibits a high transmittance (>84%) over a wide wavelength range from 340 to 2500 nm. The refractive indices in the range from 0.31256 to 1.01398 µm were measured, and Sellmeier's equations were fitted by the least squares method. The nonlinear absorption properties were studied by using the open-aperture Z-scan technique, with a nonlinear absorption coefficient measured to be on the order of 0.257 cm/GW at the peak power density of 16.4 GW/cm 2 . Such high transmittance and wide transparency indicate that optical devices using the Ba 2 TiSi 2 O 8 crystal can be applied over a wide wavelength range. Furthermore, the small nonlinear absorption observed in Ba 2 TiSi 2 O 8 will effectively increase the optical conversion efficiency, decreasing the generation of laser damage of the optical device.

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Section: Methodsmentioning

confidence: 99%

“…When the specimen moves along the ±Z direction, the normalized light transmittance T can be calculated using the following formula [24,25]:…”

Section: Methodsmentioning

confidence: 99%

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Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal

et al. 2017

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“…Monolayer MoS 2 also demonstrates two‐photon upconversion luminescence with a nonsaturation two‐photon absorption coefficient of (7.62 ± 0.15) × 10 3 cm GW –1 , which is three orders of magnitude higher than conventional semiconductors. Degenerate two‐photon absorption is also observed for thin WS 2 (bandgap: ≈1.9 eV for monolayer) films of different thickness (smaller than 41 layers) at 1030 nm (Figure ) as well as WS 2 sheets dispersed in a PMMA matrix at 800 nm . Based on these experimental observations, the authors have tentatively ascribed the difference in NLO absorption between monolayer and few‐layer MoS 2 to the variation of electronic structure.…”

Section: Nonlinear Optical Properties In Emerging Ld Materialsmentioning

confidence: 78%

Emerging Low‐Dimensional Materials for Nonlinear Optics and Ultrafast Photonics

2017

Self Cite

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Low-dimensional (LD) materials demonstrate intriguing optical properties, which lead to applications in diverse fields, such as photonics, biomedicine and energy. Due to modulation of electronic structure by the reduced structural dimensionality, LD versions of metal, semiconductor and topological insulators (TIs) at the same time bear distinct nonlinear optical (NLO) properties as compared with their bulk counterparts. Their interaction with short pulse laser excitation exhibits a strong nonlinear character manifested by NLO absorption, giving rise to optical limiting or saturated absorption associated with excited state absorption and Pauli blocking in different materials. In particular, the saturable absorption of these emerging LD materials including two-dimensional semiconductors as well as colloidal TI nanoparticles has recently been utilized for Q-switching and mode-locking ultra-short pulse generation across the visible, near infrared and middle infrared wavelength regions. Beside the large operation bandwidth, these ultrafast photonics applications are especially benefit from the high recovery rate as well as the facile processibility of these LD materials. The prominent NLO response of these LD materials have also provided new avenues for the development of novel NLO and photonics devices for all-optical control as well as optical circuits beyond ultrafast lasers.

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“…As an alternative Mo source of sodium molybdate (Na 2 MoO 4 ), the process could also be hydrothermally reduced by thioacetamide to synthesize uniform MoS 2 nanosheets in water [72]. MoS 2 and WS 2 nanosheets could also be synthesised by other Mo or W sources and sulphur sources under hydrothermal or solvothermal conditions [73][74][75][76][77].…”

Section: Chemical Synthesis (Bottom-up Method)mentioning

confidence: 99%

Strategies of Fabricating Graphene and Graphene-Analogous 2d Nanosheets

Zhang¹

2018

Ceramics - Silikaty

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Due to the unique structures and properties of graphene and graphene-analogous two-dimensional (2D) nanosheets, such as MoS 2 , C 3 N 4 , black phosphorus nanosheets, numerous methods were developed to prepare these 2D nanosheets, however, it is still a challenge to fabricate high quality 2D nanosheets cost-effectively on a large scale. This paper reviewed the recent progress of the strategies when fabricating graphene and graphene-analogous 2D nanosheets. These strategies were divided into five main categories based on the basic principles: physical exfoliation, chemical exfoliation, electrochemical exfoliation, chemical synthesis and chemical vapour deposition (CVD). The merits of each category were summarised and analysed, and the drawbacks were highlighted as well in detail. It provides an avenue to design and fabricate different kinds of high quality 2D nanosheets cost-effectively on a large scale for energy storage and conversion, catalysis, sensors, electronics, and so on.

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Facile synthesis of two-dimensional WS2 with reverse saturable absorption and nonlinear refraction properties in the PMMA matrix

Cited by 25 publications

References 41 publications

Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal

Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal

Emerging Low‐Dimensional Materials for Nonlinear Optics and Ultrafast Photonics

Strategies of Fabricating Graphene and Graphene-Analogous 2d Nanosheets

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