Nonlinear photoresponse of metallic graphene-like VSe2 ultrathin nanosheets for pulse laser generation

Wang, Tao; Shi, Xueling; Wang, Jin; Xu, Yi‐Jun; Chen, Jie; Dong, Zhuo; Jiang, Man; Ma, Pengfei; Su, Rongtao; Ma, Yanxing; Wu, Jian; Zhang, Kai; Zhang, Pu

doi:10.1007/s11432-019-2677-9

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…However, this process is incompatible with the practical catalytic application. Alternatively, bottom-up approaches, including liquid phase reaction, chemical vapor deposition, and physical vapor deposition, are demonstrated to be more suitable routes for the synthesis of a large amount of VSe 2 flakes or VSe 2 thin films. − Furthermore, it is proposed that the electrocatalytic performance of 2D VSe 2 flakes can be greatly enhanced by forming abundant active catalyst sites along the flake sides or loading metal nanoparticles. − Hence, it is extremely desirable to realize the controllable growth of VSe 2 flakes with abundant edges and metal nanoparticles, which may promote their applications in the catalyst field.…”

Section: Introductionmentioning

confidence: 99%

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions

Zhang

Xiao

et al. 2022

ACS Appl. Nano Mater.

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VSe2 is a typical two-dimensional (2D) transition-metal dichalcogenide material with various physical properties, such as ultrahigh electrical conductivity, controversial magnetism, and active catalytic properties. However, controllable preparation of VSe2 2D structures poses many challenges, and their application has not yet been developed. Here, we controllably synthesize VSe2 2D flakes on highly oriented pyrolytic graphite (HOPG) using molecular beam epitaxy. By controlling the growth temperature and the evaporation rate of the source, we obtained various morphologies of VSe2 flakes, including single- and multilayers with triangular and belt shapes. Compared with the triangular structures of the flakes, the one-dimensional nanobelt structures have a larger edge density and can provide more catalytic active sites. Hydrogen evolution reaction results indicate that the belt-shaped VSe2 flakes exhibit superior catalytic performance. Due to the presence of plenty of edges, the overpotential of the belt-shaped VSe2 is 543 mV at a current density of 1 mA/cm2, which is much lower than that in the triangular flakes. The VSe2 flakes with a larger edge density are more conductive than the regular triangular flakes after loading metal atoms due to the efficient dispersion of the metal atoms. As a result, the multistructure of Co particle-decorated VSe2 flakes achieves a high catalytic performance with 352 mV overpotential at a current density of 10 mA/cm2, demonstrating their potential applications in the catalyst field.

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Section: Introductionmentioning

confidence: 99%

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions

Zhang

Xiao

et al. 2022

ACS Appl. Nano Mater.

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“…[20] Wang et al and Li et al used VSe 2 as a SA to achieve Q-switched and mode-locked pulse output in the 1 and 1.5 μm bands, respectively. [21,22] But in general, there are few reports on the application of VSe 2 in the field of ultrashort pulses. In our work, we successfully use 1T-VSe 2 as a SA in a ring erbium-doped fiber laser to generate picoseconds pulses.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Vanadium Diselenide Nanosheets for the Realization of Compact Pulsed Fiber Lasers

Zhang

Zhao

et al. 2021

Annalen der Physik

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Vanadium diselenide (VSe 2 ), as a transition metal dichalcogenides (TMDC), is an important class of graphene-like 2D layered materials. It has excellent optical absorption nonlinearity, high thermal damage threshold, and large modulation depth, which can make it to be applied in the field of ultrashort pulse. Here, the nonlinear optical absorption properties of VSe 2 are investigated along with in-depth exploration of its ultrafast photonics performance. VSe 2 is used as a saturable absorber (SA) in an erbium-doped fiber ring laser to successfully generate a mode-locked laser pulse with a central wavelength of 1565.3 nm, a repetition rate of 5.882 MHz, and a pulse width of 1.2 ps. What is noticeable is that the pulse has a high signal-to-noise ratio, which ensures that the mode-locked pulse can remain stable for a long time. The results suggest that VSe 2 as TMDC has potential applications in optical communications. Furthermore, this study expands the field of SA materials in fiber lasers.

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“…The mode-locking and modulation is realized by combining SA with tapered fiber, which can easily make use of the interaction between light and material in evanescent field. VSe 2 has strong nonlinear characteristics, however, there are few reports on its application in ultrafast fiber lasers currently by now [32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Optical pulse modulators based on layered vanadium diselenide nanosheets

Li¹,

Li²,

Zhao³

et al. 2021

Nanotechnology

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The transition metal disulfides of VB group elements have gradually come into people’s field of vision owing to their two-dimensional structure and unique optical properties. Vanadium diselenide (VSe2) as a kind of transition metal diselenides, is competent for the applications of nonlinear saturable absorption. The dispersion of few-layer VSe2 is prepared by liquid phase exfoliation method. Clearly, it has an obvious layered structure, and the interlayer spacing is 0.31 nm. The VSe2 nanosheets are inserted into the Erbium-doped fiber laser through tapered deposition method and the measured modulation depth is 1.46%. A 1530.5 nm centered 851-fs pulse is observed with the 3.2 nm 3-dB spectral width. The experimental results show that the pulse is persistent under the power of 334 mW, with signal-to-noise ratio of 41 dB. And an up to 552.4 MHz modulation phenomenon is observed around 1560 nm, so is its frequency tunability. This is the first time that VSe2 is used to realize high frequency modulation in fiber laser. It is proved that VSe2 is expected to be a budding material of ultrafast optical modulation devices and widely used in the field of ultrafast photonics.

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Nonlinear photoresponse of metallic graphene-like VSe2 ultrathin nanosheets for pulse laser generation

Cited by 11 publications

References 39 publications

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions

High‐Performance Vanadium Diselenide Nanosheets for the Realization of Compact Pulsed Fiber Lasers

Optical pulse modulators based on layered vanadium diselenide nanosheets

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Nonlinear photoresponse of metallic graphene-like VSe2 ultrathin nanosheets for pulse laser generation

Cited by 11 publications

References 39 publications

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe2 Nanoflakes for Hydrogen Evolution Reactions

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe2 Nanoflakes for Hydrogen Evolution Reactions

High‐Performance Vanadium Diselenide Nanosheets for the Realization of Compact Pulsed Fiber Lasers

Optical pulse modulators based on layered vanadium diselenide nanosheets

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Product

Resources

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Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions

Morphology-Controlled Electrocatalytic Performance of Two-Dimensional VSe₂ Nanoflakes for Hydrogen Evolution Reactions